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Patent Assignment Assignor Details
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Assignor Name : HOLTGRAVER, EDWARD G.
Total Assignments: 10
Assignment: 1
Reel/Frame:003975/0734   Pages: 1
Recorded: 02/01/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
SCOBIE, WILLIAM B.
Exec Dt:
01/26/1982
2
HOLTGRAVER, EDWARD G.
Exec Dt:
01/26/1982
Assignee
1
KEYSTONE INTERNATIONAL, INC.
HOUSTON, TEXAS
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4410163
NONE
06344502
Correspondence name and address
MARGARET E. ANDERSON
BROWNING, BUSHMAN & ZAMECKI
4615 SOUTHWEST FREEWAY, STE. 900E
HOUSTON, TX 77027
Assignment: 2
Reel/Frame:003975/0939   Pages: 1
Recorded: 02/04/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
HOLTGRAVER, EDWARD G.
Exec Dt:
01/29/1982
Assignee
1
KEYSTONE INTERNATIONAL, INC.
HOUSTON, TEXAS
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4399833
NONE
06345660
Correspondence name and address
MARGARET E. ANDERSON
BROWNING, BUSHMAN & ZAMECKI
4615 SOUTHWEST FREEWAY, STE. 900 E
HOUSTON, TX 77027
Assignment: 3
Reel/Frame:004354/0301   Pages: 1
Recorded: 12/28/1984
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
HOLTGRAVER, EDWARD G.
Exec Dt:
12/21/1984
Assignee
1
KEYSTONE INTERNATIONAL, INC.
A TX CORP
HOUSTON, TEXAS
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4570901
NONE
06687293
Correspondence name and address
C. JAMES BUSHMAN
BROWNING, BUSHMAN, ZAMECKI & ANDERSON
5718 WESTHEIMER, STE. 1800
HOUSTON, TX 77057
Assignment: 4
Reel/Frame:004594/0556   Pages: 1
Recorded: 08/20/1986
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
HOLTGRAVER, EDWARD G.
Exec Dt:
08/18/1986
Assignee
1
KEYSTONE INTERNATIONAL, INC., A CORP OF TX.
P.O. BOX 40010
HOUSTON, TEXAS 77240
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
4711427
NONE
06898433
Correspondence name and address
C. JAMES BUSHMAN
BROWNING, BUSHMAN, ZAMECKI & ANDERSON
5718 WESTHEIMER, STE. 1800
HOUSTON, TX 77057
Assignment: 5
Reel/Frame:007631/0563   Pages: 2
Recorded: 04/17/1995
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
HOLTGRAVER, EDWARD G.
Exec Dt:
04/10/1995
Assignee
1
HENRY PRATT COMPANY
401 SOUTH HIGHLAND AVENUE
AURORA, ILLINOIS 60506
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5538029
NONE
08422817
Correspondence name and address
FISH & RICHARDSON P.C.
PHYLLIS K, KRISTAL
225 FRANKLIN STREET
BOSTON, MA 02110-2804
Assignment: 6
Reel/Frame:009314/0001   Pages: 3
Recorded: 07/13/1998
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
HOLTGRAVER, EDWARD G.
Exec Dt:
07/02/1998
Assignee
1
QTRCO, INC.
1125OA TIMBER TECH AVE.
TOMBALL, TEXAS 77375
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
5492050
NONE
08194921
Correspondence name and address
HARRISON & EGBERT
JOHN S. EGBERT
1018 PRESTON ST., SUITE 100
HOUSTON, TEXAS 77002
Assignment: 7
Reel/Frame:034421/0576   Pages: 2
Recorded: 12/08/2014
Attorney Dkt #:QTRCO-4
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
HOLTGRAVER, EDWARD G.
Exec Dt:
11/04/2014
Assignee
1
QTRCO, INC.
13120 THEIS LANE
TOMBALL, TEXAS 77375
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
US20150362078
14396526
Correspondence name and address
ERIN J. WERNER
1001 WEST LOOP SOUTH
SUITE 810
HOUSTON, TX 77027
Assignment: 8
Reel/Frame:046191/0743   Pages: 2
Recorded: 05/21/2018
Attorney Dkt #:QTR-17
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
HOLTGRAVER, EDWARD G.
Exec Dt:
05/17/2018
2
HOWARD, JAMES R.
Exec Dt:
05/17/2018
Assignee
1
QTRCO, INC.
13120 THEIS LANE
TOMBALL, TEXAS 77375
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
10132337
US20170314584
15140699
Correspondence name and address
BUSHMAN WERNER, P.C.
1800 AUGUSTA DR.
SUITE 220
HOUSTON, TX 77057
Assignment: 9
Reel/Frame:046191/0779   Pages: 2
Recorded: 05/21/2018
Attorney Dkt #:QTR-18
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
HOLTGRAVER, EDWARD G.
Exec Dt:
05/17/2018
2
HOWARD, JAMES R.
Exec Dt:
05/17/2018
Assignee
1
QTRCO, INC.
13120 THEIS LANE
TOMBALL, TEXAS 77375
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
10533583
US20180135665
15871757
Correspondence name and address
BUSHMAN WERNER, P.C.
1800 AUGUSTA DR.
SUITE 220
HOUSTON, TX 77057
Assignment: 10
Reel/Frame:062439/0762   Pages: 2
Recorded: 01/20/2023
Attorney Dkt #:QTRCO-21
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
HOLTGRAVER, EDWARD G.
Exec Dt:
01/19/2023
Assignee
1
QTRCO, INC.
13120 THEIS LANE
TOMBALL, TEXAS 77375
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
11879564
US20230213114
18149547
Correspondence name and address
ERIN J. WERNER
PO BOX 70648
HOUSTON, TX 77270

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