Individual holder
KAPPHAHN JOHN M
5 granted patents·17 citations·filing 1981–2015
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0168US9072217B2Vacuum planter exhaust filtration systemKAPPHAHN JOHN M·Filed 2013·Granted Jul 7, 2015·7 cites·20 claims
- 0248USD272980SSickle guard straightening hand toolKAPPHAHN JOHN M·Filed 1981·Granted Mar 13, 1984·5 cites·1 claims
- 0342US9451741B2Vacuum planter exhaust filtration systemKAPPHAHN JOHN M·Filed 2015·Granted Sep 27, 2016·0 cites·20 claims
- 0434US4541267ASickle guard aligning toolKAPPHAHN JOHN M·Filed 1983·Granted Sep 17, 1985·4 cites·23 claims
- 0532USD280068SSickle guard aligning hand toolKAPPHAHN JOHN M·Filed 1983·Granted Aug 13, 1985·1 cites·1 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →