Individual holder
CHISHOLM DOUGLAS B
5 granted patents·323 citations·filing 1976–1980
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0195US4330106AGuard rail constructionCHISHOLM DOUGLAS B·Filed 1979·Granted May 18, 1982·122 cites·29 claims
- 0290US4007564ABreakaway coupling and assemblyCHISHOLM DOUGLAS B·Filed 1976·Granted Feb 15, 1977·71 cites·10 claims
- 0386US4490062ACouplings for sign posts and the likeCHISHOLM DOUGLAS B·Filed 1980·Granted Dec 25, 1984·60 cites·13 claims
- 0480US4236843ASign post couplingsCHISHOLM DOUGLAS B·Filed 1978·Granted Dec 2, 1980·39 cites·29 claims
- 0572US4052826ABreakaway coupling assembly with fracture-initiating washerCHISHOLM DOUGLAS B·Filed 1976·Granted Oct 11, 1977·31 cites·10 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →