Assignee
JOHNSON DAVID G
3 granted patents·128 citations·filing 1985–1991
Top patents by PatentIndex Score
3 records- 0192US5314235APortable back supportJOHNSON DAVID G·Filed 1991·Granted May 24, 1994·120 cites·11 claims
- 0249USD343776SSod pluggerJOHNSON DAVID G·Filed 1991·Granted Feb 1, 1994·6 cites·1 claims
- 0329US4652242APsychological testing of the visually impairedJOHNSON DAVID G·Filed 1985·Granted Mar 24, 1987·2 cites·10 claims
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