Assignee

JOHNSON RICHARD N

US·2 granted patents·119 citations·filing 1979–1991

Technology mixA61G1 B60K1 F01K1 Y10S1

Top patents by PatentIndex Score

2 records

0191US5121806APower wheelchair with torsional stability systemJOHNSON RICHARD N·Filed 1991·Granted Jun 16, 1992·113 cites·15 claims
0239US4295334AParametric energy converterJOHNSON RICHARD N·Filed 1979·Granted Oct 20, 1981·6 cites·10 claims

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