Individual holder
COHEN MARTHA G
US·3 granted patents·29 citations·filing 1988–1991
Individually held — no corporate assignee on record.
Technology mixG09B3
Top patents by PatentIndex Score
3 records- 0145US5110296AEducational device for teaching a child to tie a bowCOHEN MARTHA G·Filed 1991·Granted May 5, 1992·21 cites·5 claims
- 0231US4822284AEducational appliance for teaching handwriting skillsCOHEN MARTHA G·Filed 1988·Granted Apr 18, 1989·7 cites·20 claims
- 0322US5040986AEducational device for teaching handwriting skillsCOHEN MARTHA G·Filed 1990·Granted Aug 20, 1991·1 cites·18 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →