Assignee
NAT BLANK BOOK COMPANY INC
3 granted patents·36 citations·filing 1976–1979
Top patents by PatentIndex Score
3 records- 0186US4049119ATape cassette filing unitNAT BLANK BOOK COMPANY INC·Filed 1976·Granted Sep 20, 1977·27 cites·4 claims
- 0243USD261008SSheet lifter for a loose leaf ring binderNAT BLANK BOOK COMPANY INC·Filed 1979·Granted Sep 29, 1981·6 cites·1 claims
- 0330US4038768AViewer storing microfiche file binderNAT BLANK BOOK COMPANY INC·Filed 1976·Granted Aug 2, 1977·3 cites·3 claims
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