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Patent Assignment Assignee Details
NOTE:Results display only for issued patents and published applications. For pending or abandoned applications please consult USPTO staff.

Assignee Name : EISAI CO. LTD.
Total Assignments: 25
Assignment: 1
Reel/Frame:003913/0263   Pages: 1
Recorded: 09/28/1981
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
Exec Dt:
12/09/1980
2
Exec Dt:
12/09/1980
3
Exec Dt:
12/10/1980
4
Exec Dt:
12/11/1980
5
Exec Dt:
12/11/1980
6
Exec Dt:
12/11/1980
7
Exec Dt:
12/11/1980
Assignees
1
6-10, KOISHIKAWA, 4-CHOME, BUNKYO-KU
TOKYO, JAPAN
2
3-1, KASUMIGASEKI 1-CHOME, CHIYODA-KU
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06221163
Correspondence name and address
BLANCHARD, FLYNN, THIEL, BOUTELL & TANIS
2026 RAMBLING ROAD
KALAMAZOO, MI 49008
Assignment: 2
Reel/Frame:003914/0124   Pages: 1
Recorded: 08/27/1981
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
Exec Dt:
08/19/1981
2
Exec Dt:
08/19/1981
3
Exec Dt:
08/19/1981
4
Exec Dt:
08/19/1981
5
Exec Dt:
08/18/1981
6
Exec Dt:
08/18/1981
7
Exec Dt:
08/18/1981
8
Exec Dt:
08/18/1981
Assignee
1
6-10, KOISHIKAWA, 4-CHOME, BUNKYO-KU
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06296728
Correspondence name and address
BLANCHARD, FLYNN, THIEL, BOUTELL & TANIS
2026 RAMBLING RD.
KALAMAZOO, MI 49008
Assignment: 3
Reel/Frame:003976/0033   Pages: 1
Recorded: 02/04/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
Exec Dt:
01/25/1982
2
Exec Dt:
01/25/1982
3
Exec Dt:
01/25/1982
Assignee
1
6-10, KOISHIKAWA, 4-CHOME
BUNKYO-KU, TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06345834
Correspondence name and address
BLANCHARD, FLYNN, THIEL, BOUTELL
& TANIS, 2026 RAMBLING ROAD
KALAMAZOO, MI 49008
Assignment: 4
Reel/Frame:003975/0220   Pages: 1
Recorded: 02/18/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
Exec Dt:
02/03/1982
2
Exec Dt:
02/03/1982
3
Exec Dt:
02/03/1982
Assignee
1
6-10, KOISHIKAWA, 4-CHOME
BUNKYO-KU, TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06349950
Correspondence name and address
BLANCHARD, FLYNN, THIEL,
BOUTELL AND TANIS
2026 RAMBLING ROAD
KALAMAZOO, MI 49008
Assignment: 5
Reel/Frame:003988/0752   Pages: 2
Recorded: 02/26/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
Exec Dt:
02/16/1982
Assignee
1
6-10, KOISHIKAWA 4-CHOME, BUNKYO-KU
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06352871
Correspondence name and address
WENDEROTH, LIND & PONACK
1750 PA., AVE., N. W., STE. 1100
WASHINGTON, DC 20006
Assignment: 6
Reel/Frame:004013/0864   Pages: 2
Recorded: 05/26/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
Exec Dt:
05/13/1982
2
Exec Dt:
05/13/1982
3
Exec Dt:
05/13/1982
Assignee
1
6-10, KOISHIKAWA 4-CHOME, BUNKYO-KU
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06382364
Correspondence name and address
WENDEROTH, LIND & PONACK
1750 PA. AVE., N. W., STE. 1100
WASHINGTON, DC 20006
Assignment: 7
Reel/Frame:004013/0977   Pages: 3
Recorded: 05/27/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
Exec Dt:
05/13/1982
2
Exec Dt:
05/13/1982
3
Exec Dt:
05/13/1982
4
Exec Dt:
05/13/1982
5
Exec Dt:
05/13/1982
6
Exec Dt:
05/13/1982
7
Exec Dt:
05/13/1982
8
Exec Dt:
05/13/1982
Assignee
1
6-10, KOISHIKAWA 4-CHOME, BUNKYO-KU,
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06382792
Correspondence name and address
WENDEROTH, LIND, & PONACK
1750 PA. AVE., N. W., STE. 1100
WASHINGTON, DC 20006
Assignment: 8
Reel/Frame:004034/0017   Pages: 1
Recorded: 08/09/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor
1
Exec Dt:
07/07/1982
Assignee
1
N0. 6-10 KOISHIKAWA 4-CHOME, BUNKYO-KU
TOKYO, 112, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06406626
Correspondence name and address
BLANCHARD, FLYNN, ET AL
2026 RAMBLING RD.
KALAMAZOO, MI 49008
Assignment: 9
Reel/Frame:004074/0150   Pages: 1
Recorded: 12/01/1982
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
Exec Dt:
11/15/1982
2
Exec Dt:
11/15/1982
3
Exec Dt:
11/15/1982
4
Exec Dt:
11/16/1982
5
Exec Dt:
11/16/1982
Assignee
1
6-10, KOISHIKAWA, 4-CHOME, BUNKYO-KU
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06446079
Correspondence name and address
BLANCHARD, FLYNN, THIEL, BOUTELL & TANIS
2026 RAMBLING ROAD
KALAMAZOO, MI 49008
Assignment: 10
Reel/Frame:004136/0123   Pages: 2
Recorded: 05/19/1983
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST.
Assignors
1
Exec Dt:
04/27/1983
2
Exec Dt:
04/27/1983
3
Exec Dt:
04/27/1983
4
Exec Dt:
04/27/1983
Assignee
1
6-10, KOSHIKAWA 4-CHOME, BUNKYO-KU
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
06497255
Correspondence name and address
WENDEROTH, LIND & PONACK
1750 PENN. AVE., N.W., STE. 1100
WASHINGTON, DC 20006
Assignment: 11
Reel/Frame:011193/0577   Pages: 5
Recorded: 10/10/2000
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
10/04/2000
2
Exec Dt:
10/05/2000
3
Exec Dt:
10/03/2000
Assignee
1
4-6-10 KOISHIKAWA
BUNKYO-KU, TOKYO 112-8088, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
09496152
Correspondence name and address
HALE AND DORR, LLP
HOLLIE L. BAKER, ESQ.
60 STATE STREET
BOSTON, MA 02109
Assignment: 12
Reel/Frame:013148/0023   Pages: 13
Recorded: 08/05/2002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
07/17/2002
2
Exec Dt:
07/17/2002
3
Exec Dt:
07/17/2002
4
Exec Dt:
07/17/2002
5
Exec Dt:
07/17/2002
Assignee
1
6-10 KOISHIKASA 4-CHROME, BUNKYO-KU
TOKYO, JAPAN 112-8
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
10024877
Correspondence name and address
CHOATE, HALL & STEWART
NADEGE M. LAGNEAU
EXCHANGE PLACE, 53 STATE STREET
BOSTON, MA 02109
Assignment: 13
Reel/Frame:013160/0728   Pages: 5
Recorded: 08/06/2002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
07/17/2002
2
Exec Dt:
07/17/2002
Assignee
1
6-10 KOISHIKASA 4-CHROME, BUNKYO-KU
TOKYO, JAPAN 112-8088
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
10024876
Correspondence name and address
CHOATE, HALL & STEWART
NADEGE M. LAGNEAU
EXCHANGE PLACE
53 STATE STREET
BOSTON, MA 02109
Assignment: 14
Reel/Frame:013173/0451   Pages: 4
Recorded: 08/06/2002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
07/29/2002
2
Exec Dt:
07/29/2002
Assignee
1
4-6-10 KOISHIKAWA
BUNKYO-KU
TOKYO, JAPAN 112-8088
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
10157791
Correspondence name and address
HALE AND DORR LLP
HOLLIE L. BAKER
60 STATE STREET
BOSTON MA 02109
Assignment: 15
Reel/Frame:013569/0360   Pages: 4
Recorded: 12/11/2002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
10/16/2002
2
Exec Dt:
10/15/2002
3
Exec Dt:
10/15/2002
Assignee
1
6-10 KOISHIKASA 4-CHROME, BUNKY-KU
TOKYO, JAPAN 112-8088
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
10025032
Correspondence name and address
CHOATE, HALL & STEWART
NADEGE M. LAGNEAU
53 STATE STREET
BOSTON, MA 02109
Assignment: 16
Reel/Frame:014622/0170   Pages: 3
Recorded: 05/23/2003
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
05/13/2003
2
Exec Dt:
05/13/2003
3
Exec Dt:
05/13/2003
4
Exec Dt:
05/13/2003
5
Exec Dt:
05/13/2003
6
Exec Dt:
05/13/2003
Assignee
1
6-10, KOIKSHIKAWA 4-CHOME
BUNKYO-KU
TOKYO 112-8088, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
10432661
Correspondence name and address
KNOBBE, MARTENS, OLSON, ET AL.
CHE SWYDEN CHERESKIN, PH.D.
2040 MASIN STREET
14TH FLOOR
IRVINE, CA 92614
Assignment: 17
Reel/Frame:014937/0973   Pages: 11
Recorded: 09/19/2003
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
09/01/2003
2
Exec Dt:
09/01/2003
3
Exec Dt:
09/01/2003
4
Exec Dt:
09/01/2003
Assignee
1
6-10 KOISHIKASA 4-CHROME, BUNKYO-KU
TOKYO, JAPAN 112-8088
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
10472621
Correspondence name and address
CHOATE, HALL & STEWART
BRENDA HERSCHBACH JARRELL, PH.D.
53 STATE STREET
EXCHANGE PLACE
BOSTON, MA 02109
Assignment: 18
Reel/Frame:015701/0884   Pages: 5
Recorded: 02/11/2004
Attorney Dkt #:0425-1111p
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
01/21/2004
2
Exec Dt:
01/21/2004
3
Exec Dt:
01/21/2004
4
Exec Dt:
01/21/2004
5
Exec Dt:
01/21/2004
6
Exec Dt:
01/21/2004
7
Exec Dt:
01/21/2004
8
Exec Dt:
01/21/2004
9
Exec Dt:
01/21/2004
10
Exec Dt:
01/21/2004
Assignee
1
6-10, KOISHIKAWA 4-CHOME, BUNKYO-KU
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
10486396
Correspondence name and address
BIRCH, STEWART, KOLASCH & BIRCH, LLP
RAYMOND C. STEWART
P.O. BOX 747
FALLS CHURCH, VA 22040-0747
Assignment: 19
Reel/Frame:015449/0824   Pages: 17
Recorded: 06/11/2004
Attorney Dkt #:20039460066
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
03/26/2004
2
Exec Dt:
03/26/2004
3
Exec Dt:
03/26/2004
4
Exec Dt:
04/09/2004
5
Exec Dt:
03/29/2004
6
Exec Dt:
04/12/2004
7
Exec Dt:
04/02/2004
8
Exec Dt:
03/26/2004
9
Exec Dt:
03/29/2004
10
Exec Dt:
04/01/2004
11
Exec Dt:
03/26/2004
12
Exec Dt:
03/31/2004
13
Exec Dt:
03/29/2004
14
Exec Dt:
04/07/2004
15
Exec Dt:
04/07/2004
16
Exec Dt:
04/02/2004
17
Exec Dt:
03/26/2004
18
Exec Dt:
03/29/2004
19
Exec Dt:
03/31/2004
20
Exec Dt:
03/26/2004
21
Exec Dt:
03/29/2004
22
Exec Dt:
04/02/2004
23
Exec Dt:
03/26/2004
24
Exec Dt:
04/08/2004
25
Exec Dt:
03/29/2004
26
Exec Dt:
04/07/2004
27
Exec Dt:
03/26/2004
28
Exec Dt:
03/26/2004
Assignee
1
6-10, KOISHIKAWA 4-CHOME
BUNKYO-KU, TOKYO, JAPAN 112-8088
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
10475045
Correspondence name and address
PATEND DEPARTMENT
NADEGE M. LAGNEAU, PH.D.
EXCHANGE PLACE
53 STATE STREET
BOSTON, MA 02109
Assignment: 20
Reel/Frame:015567/0798   Pages: 3
Recorded: 07/19/2004
Attorney Dkt #:2003946-0077
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
06/15/2004
2
Exec Dt:
06/17/2004
Assignee
1
6-10, KOISHIKAWA 4-CHOME
BUNKYO-KU TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
10785891
Correspondence name and address
CHOATE, HALL & STEWART
NADEGE M. LAGNEAU, PH.D.
EXCHANGE PLACE 53 STATE STREET
BOSTON, MA 02109
Assignment: 21
Reel/Frame:015472/0812   Pages: 3
Recorded: 12/16/2004
Attorney Dkt #:04520/030002
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor
1
Exec Dt:
11/19/2004
Assignee
1
6-10 KOISHIKAWA 4 CHOME BUNKYO-KU
TOKYO 112-8088, JAPAN
Properties
 
Pat #
Pub #
Intl #
App #
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
10479774
 
10479774
Correspondence name and address
CLARK & ELBING LLP
101 FEDERAL STREET
BOSTON, MA 02110
Assignment: 22
Reel/Frame:020207/0261   Pages: 5
Recorded: 12/06/2007
Attorney Dkt #:04520/050003
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
12/22/2004
2
Exec Dt:
12/21/2004
3
Exec Dt:
12/20/2004
4
Exec Dt:
12/20/2004
Assignee
1
6-10, KOISHIKAWA 4-CHOME
BUNKYO-KU
TOKYO, JAPAN 112-8088
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
11697651
Correspondence name and address
SUSAN M. MICHAUD, PH.D.
CLARK & ELBING LLP
101 FEDERAL STREET
BOSTON, MA 02110
Assignment: 23
Reel/Frame:022996/0980   Pages: 5
Recorded: 07/23/2009
Attorney Dkt #:04520/050004
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
12/22/2004
2
Exec Dt:
12/20/2004
3
Exec Dt:
12/21/2004
4
Exec Dt:
12/20/2004
Assignee
1
KOISHIKAWA, BUNKYO-KU 4-6-10
TOKYO, JAPAN
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
12416489
Correspondence name and address
SUSAN M. MICHAUD, PH.D.
CLARK & ELBING LLP
101 FEDERAL STREET
BOSTON, MA 02110
Assignment: 24
Reel/Frame:017306/0625   Pages: 5
Recorded: 03/03/2006
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
02/02/2006
2
Exec Dt:
02/08/2006
3
Exec Dt:
02/09/2006
Assignee
1
KOISHIKAWA 4-CHOME
BUNKYO-KU, TOKYO, JAPAN 112-8088
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
NONE
11299260
Correspondence name and address
C. HUNTER BAKER, M.D., PH.D.
CHOATE, HALL, & STEWART LLP
PATENT DEPARTMENT
TWO INTERNATIONAL PLACE
BOSTON, MA 02110
Assignment: 25
Reel/Frame:017980/0710   Pages: 4
Recorded: 07/24/2006
Attorney Dkt #:109536.227
Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors
1
Exec Dt:
06/02/2006
2
Exec Dt:
06/07/2006
Assignee
1
6-10 KOISHIKAWA, 4-CHOME, BUNKYO-KU
TOKYO, JAPAN 112-8088
Property
 
Pat #
Pub #
Intl #
App #
 
 
 
 
 
 
 
 
 
 
 
11411564
Correspondence name and address
WILMER CUTLER PICKERING HALE AND DORR LL
60 STATE STREET
HOLLIE L. BAKER
BOSTON, MA 02109

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