Assignee
NAT BLANK BOOK CO
5 granted patents·116 citations·filing 1976–1979
Top patents by PatentIndex Score
5 records- 0191US4256411AFile folder with integral loose leaf binder ringsNAT BLANK BOOK CO·Filed 1979·Granted Mar 17, 1981·52 cites·2 claims
- 0281US4119200ATape cassette holderNAT BLANK BOOK CO·Filed 1977·Granted Oct 10, 1978·30 cites·4 claims
- 0368US4181381AFiling deviceNAT BLANK BOOK CO·Filed 1978·Granted Jan 1, 1980·23 cites·7 claims
- 0449US4214839ALoose leaf binderNAT BLANK BOOK CO·Filed 1978·Granted Jul 29, 1980·11 cites·8 claims
- 0523US4073553AMag card storage deviceNAT BLANK BOOK CO·Filed 1976·Granted Feb 14, 1978·0 cites·3 claims
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