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Reel/Frame:071499/0428   Pages: 17
Recorded: 06/06/2025
Attorney Dkt #:442092.000010
Conveyance: SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).
Total properties: 82
1
Patent #:
8997699
Issue Dt:
04/07/2015
Application #:
13028053
Filing Dt:
02/15/2011
Publication #:
US20120204836
Pub Dt:
08/16/2012
Title:
LINEAR FREE PISTON COMBUSTION ENGINE WITH INDIRECT WORK EXTRACTION VIA GAS LINKAGE
2
Patent #:
8662029
Issue Dt:
03/04/2014
Application #:
13298206
Filing Dt:
11/16/2011
Publication #:
US20120125291
Pub Dt:
05/24/2012
Title:
HIGH-EFFICIENCY LINEAR COMBUSTION ENGINE
3
Patent #:
8720317
Issue Dt:
05/13/2014
Application #:
13340534
Filing Dt:
12/29/2011
Publication #:
US20130167714
Pub Dt:
07/04/2013
Title:
METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE
4
Patent #:
9004038
Issue Dt:
04/14/2015
Application #:
13340538
Filing Dt:
12/29/2011
Publication #:
US20130167794
Pub Dt:
07/04/2013
Title:
Methods and Systems for Managing a Clearance Gap in a Piston Engine
5
Patent #:
9169797
Issue Dt:
10/27/2015
Application #:
13340543
Filing Dt:
12/29/2011
Publication #:
US20130167715
Pub Dt:
07/04/2013
Title:
METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE
6
Patent #:
9097203
Issue Dt:
08/04/2015
Application #:
13340544
Filing Dt:
12/29/2011
Publication #:
US20130167798
Pub Dt:
07/04/2013
Title:
Methods and Systems for Managing a Clearance Gap in a Piston Engine
7
Patent #:
8344669
Issue Dt:
01/01/2013
Application #:
13437659
Filing Dt:
04/02/2012
Title:
METHODS AND SYSTEMS FOR CONTROLLING A MULTIPHASE ELECTROMAGNETIC MACHINE
8
Patent #:
8402931
Issue Dt:
03/26/2013
Application #:
13463724
Filing Dt:
05/03/2012
Publication #:
US20120235517
Pub Dt:
09/20/2012
Title:
High-Efficiency Linear Combustion Engine
9
Patent #:
8624542
Issue Dt:
01/07/2014
Application #:
13691527
Filing Dt:
11/30/2012
Publication #:
US20130257336
Pub Dt:
10/03/2013
Title:
METHODS AND SYSTEMS FOR CONTROLLING A MULTIPHASE ELECTROMAGNETIC MACHINE
10
Patent #:
8770090
Issue Dt:
07/08/2014
Application #:
13725984
Filing Dt:
12/21/2012
Publication #:
US20130167795
Pub Dt:
07/04/2013
Title:
METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE
11
Patent #:
8656895
Issue Dt:
02/25/2014
Application #:
13725985
Filing Dt:
12/21/2012
Publication #:
US20130167717
Pub Dt:
07/04/2013
Title:
METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE
12
Patent #:
8899192
Issue Dt:
12/02/2014
Application #:
13725987
Filing Dt:
12/21/2012
Publication #:
US20130167718
Pub Dt:
07/04/2013
Title:
METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE
13
Patent #:
10006401
Issue Dt:
06/26/2018
Application #:
13725988
Filing Dt:
12/21/2012
Publication #:
US20130167796
Pub Dt:
07/04/2013
Title:
METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE
14
Patent #:
10215229
Issue Dt:
02/26/2019
Application #:
13830591
Filing Dt:
03/14/2013
Publication #:
US20140260951
Pub Dt:
09/18/2014
Title:
MECHANISM FOR MAINTAINING A CLEARANCE GAP
15
Patent #:
9719415
Issue Dt:
08/01/2017
Application #:
14598173
Filing Dt:
01/15/2015
Publication #:
US20160208686
Pub Dt:
07/21/2016
Title:
ENERGY STORAGE AND CONVERSION IN FREE-PISTON COMBUSTION ENGINES
16
Patent #:
9567898
Issue Dt:
02/14/2017
Application #:
14964463
Filing Dt:
12/09/2015
Publication #:
US20160090908
Pub Dt:
03/31/2016
Title:
HIGH-EFFICIENCY LINEAR COMBUSTION ENGINE
17
Patent #:
9657675
Issue Dt:
05/23/2017
Application #:
15087990
Filing Dt:
03/31/2016
Title:
CONTROL OF PISTON TRAJECTORY IN A FREE-PISTON COMBUSTION ENGINE
18
Patent #:
9856821
Issue Dt:
01/02/2018
Application #:
15294438
Filing Dt:
10/14/2016
Title:
OPEN-FACED PISTON ASSEMBLY
19
Patent #:
10024231
Issue Dt:
07/17/2018
Application #:
15390431
Filing Dt:
12/23/2016
Publication #:
US20170241331
Pub Dt:
08/24/2017
Title:
HIGH-EFFICIENCY LINEAR COMBUSTION ENGINE
20
Patent #:
10156198
Issue Dt:
12/18/2018
Application #:
15489657
Filing Dt:
04/17/2017
Publication #:
US20170350339
Pub Dt:
12/07/2017
Title:
CONTROL OF PISTON TRAJECTORY IN A FREE-PISTON COMBUSTION ENGINE
21
Patent #:
10190490
Issue Dt:
01/29/2019
Application #:
15645995
Filing Dt:
07/10/2017
Publication #:
US20170306837
Pub Dt:
10/26/2017
Title:
ENERGY STORAGE AND CONVERSION IN FREE-PISTON COMBUSTION ENGINES
22
Patent #:
10359002
Issue Dt:
07/23/2019
Application #:
15820240
Filing Dt:
11/21/2017
Publication #:
US20180106215
Pub Dt:
04/19/2018
Title:
OPEN-FACED PISTON ASSEMBLY
23
Patent #:
10221759
Issue Dt:
03/05/2019
Application #:
16016393
Filing Dt:
06/22/2018
Publication #:
US20180298814
Pub Dt:
10/18/2018
Title:
High-Efficiency Linear Combustion Engine
24
Patent #:
10731759
Issue Dt:
08/04/2020
Application #:
16059933
Filing Dt:
08/09/2018
Publication #:
US20190049012
Pub Dt:
02/14/2019
Title:
REINFORCED SEALING RINGS
25
Patent #:
10465795
Issue Dt:
11/05/2019
Application #:
16060000
Filing Dt:
08/09/2018
Publication #:
US20190049008
Pub Dt:
02/14/2019
Title:
PISTON-INTEGRATED GAP COVER
26
Patent #:
10975966
Issue Dt:
04/13/2021
Application #:
16100017
Filing Dt:
08/09/2018
Publication #:
US20190049006
Pub Dt:
02/14/2019
Title:
PISTON SEALING RING ASSEMBLY HAVING A GAP COVER ELEMENT
27
Patent #:
10436322
Issue Dt:
10/08/2019
Application #:
16100092
Filing Dt:
08/09/2018
Publication #:
US20190049009
Pub Dt:
02/14/2019
Title:
PISTON SEALING RING ASSEMBLIES
28
Patent #:
10927953
Issue Dt:
02/23/2021
Application #:
16100124
Filing Dt:
08/09/2018
Publication #:
US20190049011
Pub Dt:
02/14/2019
Title:
PISTON SEAL WITH SOLID LUBRICANT APPLICATOR
29
Patent #:
10443727
Issue Dt:
10/15/2019
Application #:
16100131
Filing Dt:
08/09/2018
Publication #:
US20190049013
Pub Dt:
02/14/2019
Title:
SEALING RING ASSEMBLIES CONFIGURED FOR PRESSURE LOCKING
30
Patent #:
10554099
Issue Dt:
02/04/2020
Application #:
16137029
Filing Dt:
09/20/2018
Publication #:
US20190089225
Pub Dt:
03/21/2019
Title:
DC-DC CONVERTER IN A NON-STEADY SYSTEM
31
Patent #:
10715068
Issue Dt:
07/14/2020
Application #:
16137506
Filing Dt:
09/20/2018
Publication #:
US20190123668
Pub Dt:
04/25/2019
Title:
AUTO-BRAKING FOR AN ELECTROMAGNETIC MACHINE
32
Patent #:
10408150
Issue Dt:
09/10/2019
Application #:
16175358
Filing Dt:
10/30/2018
Publication #:
US20190063357
Pub Dt:
02/28/2019
Title:
CONTROL OF PISTON TRAJECTORY IN A FREE-PISTON COMBUSTION ENGINE
33
Patent #:
10738688
Issue Dt:
08/11/2020
Application #:
16239344
Filing Dt:
01/03/2019
Publication #:
US20190136757
Pub Dt:
05/09/2019
Title:
ENERGY STORAGE AND CONVERSION IN FREE-PISTON COMBUSTION ENGINES
34
Patent #:
10404199
Issue Dt:
09/03/2019
Application #:
16248693
Filing Dt:
01/15/2019
Publication #:
US20190149074
Pub Dt:
05/16/2019
Title:
AUTO-BRAKING FOR AN ELECTROMAGNETIC MACHINE
35
Patent #:
10851708
Issue Dt:
12/01/2020
Application #:
16274003
Filing Dt:
02/12/2019
Publication #:
US20190178157
Pub Dt:
06/13/2019
Title:
HIGH-EFFICIENCY LINEAR COMBUSTION ENGINE
36
Patent #:
10669969
Issue Dt:
06/02/2020
Application #:
16452500
Filing Dt:
06/25/2019
Publication #:
US20190316543
Pub Dt:
10/17/2019
Title:
OPEN-FACED PISTON ASSEMBLY
37
Patent #:
10731586
Issue Dt:
08/04/2020
Application #:
16553052
Filing Dt:
08/27/2019
Publication #:
US20190390623
Pub Dt:
12/26/2019
Title:
CONTROL OF PISTON TRAJECTORY IN A FREE-PISTON COMBUSTION ENGINE
38
Patent #:
11346445
Issue Dt:
05/31/2022
Application #:
16561846
Filing Dt:
09/05/2019
Publication #:
US20190390770
Pub Dt:
12/26/2019
Title:
PISTON SEALING RING ASSEMBLIES
39
Patent #:
11530691
Issue Dt:
12/20/2022
Application #:
16575744
Filing Dt:
09/19/2019
Publication #:
US20200011417
Pub Dt:
01/09/2020
Title:
SEALING RING ASSEMBLIES CONFIGURED FOR PRESSURE LOCKING
40
Patent #:
11236827
Issue Dt:
02/01/2022
Application #:
16671113
Filing Dt:
10/31/2019
Publication #:
US20200124175
Pub Dt:
04/23/2020
Title:
PISTON-INTEGRATED GAP COVER
41
Patent #:
11404937
Issue Dt:
08/02/2022
Application #:
16719916
Filing Dt:
12/18/2019
Publication #:
US20200195093
Pub Dt:
06/18/2020
Title:
INTEGRATED LINEAR GENERATOR SYSTEM
42
Patent #:
10916991
Issue Dt:
02/09/2021
Application #:
16745155
Filing Dt:
01/16/2020
Publication #:
US20200227976
Pub Dt:
07/16/2020
Title:
DC-DC CONVERTER IN A NON-STEADY SYSTEM
43
Patent #:
11313318
Issue Dt:
04/26/2022
Application #:
16874322
Filing Dt:
05/14/2020
Publication #:
US20200271071
Pub Dt:
08/27/2020
Title:
OPEN-FACED PISTON ASSEMBLY
44
Patent #:
11053876
Issue Dt:
07/06/2021
Application #:
16910673
Filing Dt:
06/24/2020
Publication #:
US20210010437
Pub Dt:
01/14/2021
Title:
CONTROL OF PISTON TRAJECTORY IN A LINEAR GENERATOR
45
Patent #:
RE49259
Issue Dt:
10/25/2022
Application #:
16912538
Filing Dt:
11/30/2020
Title:
METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE
46
Patent #:
11211885
Issue Dt:
12/28/2021
Application #:
16913090
Filing Dt:
06/26/2020
Publication #:
US20200328707
Pub Dt:
10/15/2020
Title:
AUTO-BRAKING FOR AN ELECTROMAGNETIC MACHINE
47
Patent #:
11352947
Issue Dt:
06/07/2022
Application #:
16920172
Filing Dt:
07/02/2020
Publication #:
US20200400064
Pub Dt:
12/24/2020
Title:
ENERGY STORAGE AND CONVERSION IN LINEAR GENERATORS
48
Patent #:
11193588
Issue Dt:
12/07/2021
Application #:
16945580
Filing Dt:
07/31/2020
Publication #:
US20200362966
Pub Dt:
11/19/2020
Title:
REINFORCED SEALING RINGS
49
Patent #:
11525391
Issue Dt:
12/13/2022
Application #:
17106695
Filing Dt:
11/30/2020
Publication #:
US20210079838
Pub Dt:
03/18/2021
Title:
HIGH-EFFICIENCY LINEAR GENERATOR
50
Patent #:
11619303
Issue Dt:
04/04/2023
Application #:
17155674
Filing Dt:
01/22/2021
Publication #:
US20210140542
Pub Dt:
05/13/2021
Title:
PISTON SEAL WITH SOLID LUBRICANT APPLICATOR
51
Patent #:
11767915
Issue Dt:
09/26/2023
Application #:
17226566
Filing Dt:
04/09/2021
Publication #:
US20210388901
Pub Dt:
12/16/2021
Title:
PISTON SEALING RING ASSEMBLY HAVING A GAP COVER ELEMENT
52
Patent #:
11616428
Issue Dt:
03/28/2023
Application #:
17226582
Filing Dt:
04/09/2021
Publication #:
US20210288570
Pub Dt:
09/16/2021
Title:
LINEAR ELECTROMAGNETIC MACHINE SYSTEM
53
Patent #:
11339735
Issue Dt:
05/24/2022
Application #:
17350224
Filing Dt:
06/17/2021
Publication #:
US20210324812
Pub Dt:
10/21/2021
Title:
CONTROL OF PISTON TRAJECTORY IN A LINEAR GENERATOR
54
Patent #:
11976730
Issue Dt:
05/07/2024
Application #:
17526453
Filing Dt:
11/15/2021
Publication #:
US20220154830
Pub Dt:
05/19/2022
Title:
MANIFOLD INTERFACE SEAL
55
Patent #:
11652432
Issue Dt:
05/16/2023
Application #:
17527961
Filing Dt:
11/16/2021
Publication #:
US20220173682
Pub Dt:
06/02/2022
Title:
AUTO-BRAKING FOR AN ELECTROMAGNETIC MACHINE
56
Patent #:
11873906
Issue Dt:
01/16/2024
Application #:
17528723
Filing Dt:
11/17/2021
Publication #:
US20220154824
Pub Dt:
05/19/2022
Title:
SPRINGS FOR PISTON RING BIASING
57
Patent #:
11746904
Issue Dt:
09/05/2023
Application #:
17528886
Filing Dt:
11/17/2021
Publication #:
US20220074493
Pub Dt:
03/10/2022
Title:
REINFORCED SEALING RINGS
58
Patent #:
11946435
Issue Dt:
04/02/2024
Application #:
17699456
Filing Dt:
03/21/2022
Publication #:
US20220260034
Pub Dt:
08/18/2022
Title:
OPEN-FACED PISTON ASSEMBLY
59
Patent #:
11739705
Issue Dt:
08/29/2023
Application #:
17725787
Filing Dt:
04/21/2022
Publication #:
US20220381192
Pub Dt:
12/01/2022
Title:
CONTROL OF PISTON TRAJECTORY IN A LINEAR GENERATOR
60
Patent #:
12078250
Issue Dt:
09/03/2024
Application #:
17733228
Filing Dt:
04/29/2022
Publication #:
US20220356948
Pub Dt:
11/10/2022
Title:
PISTON SEALING RING ASSEMBLIES
61
Patent #:
11578646
Issue Dt:
02/14/2023
Application #:
17734350
Filing Dt:
05/02/2022
Publication #:
US20220364502
Pub Dt:
11/17/2022
Title:
ENERGY STORAGE AND CONVERSION IN LINEAR GENERATORS
62
Patent #:
11750065
Issue Dt:
09/05/2023
Application #:
17848926
Filing Dt:
06/24/2022
Publication #:
US20220399784
Pub Dt:
12/15/2022
Title:
INTEGRATED LINEAR GENERATOR SYSTEM
63
Patent #:
12255514
Issue Dt:
03/18/2025
Application #:
17876992
Filing Dt:
07/29/2022
Publication #:
US20230034504
Pub Dt:
02/02/2023
Title:
SYSTEMS AND METHODS FOR FLEXURE-BASED BEARING MOUNTING
64
Patent #:
12188457
Issue Dt:
01/07/2025
Application #:
17988048
Filing Dt:
11/16/2022
Publication #:
US20230072947
Pub Dt:
03/09/2023
Title:
SEALING RING ASSEMBLIES CONFIGURED FOR PRESSURE LOCKING
65
Patent #:
12170501
Issue Dt:
12/17/2024
Application #:
18034760
Filing Dt:
05/01/2023
Publication #:
US20240113644
Pub Dt:
04/04/2024
Title:
CORE SYNCHRONIZATION FOR LINEAR GENERATORS
66
Patent #:
12000331
Issue Dt:
06/04/2024
Application #:
18077007
Filing Dt:
12/07/2022
Publication #:
US20230101969
Pub Dt:
03/30/2023
Title:
HIGH-EFFICIENCY LINEAR GENERATOR
67
Patent #:
11867116
Issue Dt:
01/09/2024
Application #:
18109040
Filing Dt:
02/13/2023
Publication #:
US20230193817
Pub Dt:
06/22/2023
Title:
ENERGY STORAGE AND CONVERSION IN LINEAR GENERATORS
68
Patent #:
NONE
Issue Dt:
Application #:
18112634
Filing Dt:
02/22/2023
Publication #:
US20230198367
Pub Dt:
06/22/2023
Title:
LINEAR ELECTROMAGNETIC MACHINE WITH A STATOR HAVING STATOR TEETH ARRANGED TO PROVIDE AN ANTI-CLOCKING FORCE.
69
Patent #:
12283911
Issue Dt:
04/22/2025
Application #:
18132594
Filing Dt:
04/10/2023
Publication #:
US20230246576
Pub Dt:
08/03/2023
Title:
AUTO-BRAKING FOR AN ELECTROMAGNETIC MACHINE
70
Patent #:
12027956
Issue Dt:
07/02/2024
Application #:
18213428
Filing Dt:
06/23/2023
Publication #:
US20240055946
Pub Dt:
02/15/2024
Title:
INTEGRATED LINEAR GENERATOR SYSTEM
71
Patent #:
12209548
Issue Dt:
01/28/2025
Application #:
18218401
Filing Dt:
07/05/2023
Publication #:
US20240125281
Pub Dt:
04/18/2024
Title:
CONTROL OF PISTON TRAJECTORY IN A LINEAR GENERATOR
72
Patent #:
12078249
Issue Dt:
09/03/2024
Application #:
18230893
Filing Dt:
08/07/2023
Publication #:
US20230375086
Pub Dt:
11/23/2023
Title:
PISTON SEALING RING ASSEMBLY HAVING A GAP COVER ELEMENT
73
Patent #:
NONE
Issue Dt:
Application #:
18293267
Filing Dt:
01/29/2024
Publication #:
US20250092951
Pub Dt:
03/20/2025
Title:
ANTI-FRICTION SEALING RINGS
74
Patent #:
NONE
Issue Dt:
Application #:
18293267
Filing Dt:
01/29/2024
Publication #:
US20250092951
Pub Dt:
03/20/2025
PCT #:
US2238709
Title:
ANTI-FRICTION SEALING RINGS
75
Patent #:
NONE
Issue Dt:
Application #:
18518321
Filing Dt:
11/22/2023
Publication #:
US20240240586
Pub Dt:
07/18/2024
Title:
ENERGY STORAGE AND CONVERSION IN LINEAR GENERATORS
76
Patent #:
NONE
Issue Dt:
Application #:
18593424
Filing Dt:
03/01/2024
Publication #:
US20240297553
Pub Dt:
09/05/2024
Title:
HIGH-POWER CORE SYSTEM
77
Patent #:
NONE
Issue Dt:
Application #:
18651352
Filing Dt:
04/30/2024
Publication #:
US20240287930
Pub Dt:
08/29/2024
Title:
HIGH-EFFICIENCY LINEAR GENERATOR
78
Patent #:
NONE
Issue Dt:
Application #:
18674227
Filing Dt:
05/24/2024
Publication #:
US20250030317
Pub Dt:
01/23/2025
Title:
INTEGRATED LINEAR GENERATOR SYSTEM
79
Patent #:
NONE
Issue Dt:
Application #:
18786327
Filing Dt:
07/26/2024
Publication #:
US20250060035
Pub Dt:
02/20/2025
Title:
PISTON SEALING RING ASSEMBLIES
80
Patent #:
NONE
Issue Dt:
Application #:
18796918
Filing Dt:
08/07/2024
Publication #:
US20250067340
Pub Dt:
02/27/2025
Title:
PISTON SEALING RING ASSEMBLY HAVING A GAP COVER ELEMENT
81
Patent #:
NONE
Issue Dt:
Application #:
18938165
Filing Dt:
11/05/2024
Publication #:
US20250175102
Pub Dt:
05/29/2025
Title:
CORE SYNCHRONIZATION FOR LINEAR GENERATORS
82
Patent #:
NONE
Issue Dt:
Application #:
19030716
Filing Dt:
01/17/2025
Publication #:
US20250167632
Pub Dt:
05/22/2025
Title:
INTEGRATED LINEAR GENERATOR SYSTEM
Assignor
1
MAINSPRING ENERGY, INC.
Exec Dt:
06/06/2025
Assignee
1
AVENUE VENTURE OPPORTUNITIES FUND II, L.P., AS AGENT
11 WEST 42ND STREET
9TH FLOOR
NEW YORK, NEW YORK 10036
Correspondence name and address
DLA PIPER LLP (US)
4365 EXECUTIVE DRIVE
SUITE 1100
SAN DIEGO, CA 92121

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