Individual holder
JOHNSTON RICHARD P
US·4 granted patents·167 citations·filing 1988–2020
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0197US4856463AVariable-cycle reciprocating internal combustion engineJOHNSTON RICHARD P·Filed 1988·Granted Aug 15, 1989·95 cites·24 claims
- 0293US5058536AVariable-cycle reciprocating internal combustion engineJOHNSTON RICHARD P·Filed 1989·Granted Oct 22, 1991·63 cites·2 claims
- 0392US10618633B1Propeller outer slipstream control system for counter-rotating propellersJOHNSTON RICHARD P·Filed 2016·Granted Apr 14, 2020·9 cites·6 claims
- 0464US12043369B1Propeller outer slipstream control system for counter-rotating propellersJOHNSTON RICHARD P·Filed 2020·Granted Jul 23, 2024·0 cites·13 claims
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