with ink guards

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Patents Grantslast 30 patents

Information Patent Grant
Synthetic resin pen unit
- Patent number 4,840,509
- Issue date Jun 20, 1989
- Pilot Ink Co., Ltd.
- Akio Ito
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Synthetic resin pen unit
- Patent number 4,721,404
- Issue date Jan 26, 1988
- Pilot Ink Co., Ltd.
- Akio Ito
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Protective shield for a felt tip pen
- Patent number 4,453,849
- Issue date Jun 12, 1984
- Manuel J. Fernandez
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
2616395
- Patent number 2,616,395
- Issue date Nov 4, 1952
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
2077340
- Patent number 2,077,340
- Issue date Apr 13, 1937
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
1789737
- Patent number 1,789,737
- Issue date Jan 20, 1931
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
1706326
- Patent number 1,706,326
- Issue date Mar 19, 1929
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
1374870
- Patent number 1,374,870
- Issue date Apr 12, 1921
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES