Assignee
JOHNSTON DAVID F
4 granted patents·28 citations·filing 1982–1984
Top patents by PatentIndex Score
4 records- 0167US4605424AMethod and apparatus for controlling power to an electronic precipitatorJOHNSTON DAVID F·Filed 1984·Granted Aug 12, 1986·21 cites·9 claims
- 0235US4483073AHi jump step saver standardJOHNSTON DAVID F·Filed 1982·Granted Nov 20, 1984·4 cites·7 claims
- 0329US4470595AHi-jackJOHNSTON DAVID F·Filed 1982·Granted Sep 11, 1984·2 cites·11 claims
- 0429US4468024AVaulting pole end plugJOHNSTON DAVID F·Filed 1982·Granted Aug 28, 1984·1 cites·6 claims
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