Assignee
JOHNSON DAVID M
US·4 granted patents·275 citations·filing 1976–2016
Top patents by PatentIndex Score
4 records- 0194US8433409B2Implantable medical device batteryJOHNSON DAVID M·Filed 2010·Granted Apr 30, 2013·266 cites·20 claims
- 0256US9623548B1Roof shingle removing device and methodJOHNSON DAVID M·Filed 2016·Granted Apr 18, 2017·1 cites·13 claims
- 0342USD795662STool for removing roof shinglesJOHNSON DAVID M·Filed 2016·Granted Aug 29, 2017·3 cites·1 claims
- 0442US4160986ABipolar transistors having fixed gain characteristicsJOHNSON DAVID M·Filed 1976·Granted Jul 10, 1979·5 cites·8 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →