Assignee
MASSA FRANK
US·4 granted patents·159 citations·filing 1987–1989
Top patents by PatentIndex Score
4 records- 0191US4909266AUltrasonic cleaning systemMASSA FRANK·Filed 1989·Granted Mar 20, 1990·57 cites·20 claims
- 0268US4763307AWide-range audio frequency underwater transducerMASSA FRANK·Filed 1987·Granted Aug 9, 1988·44 cites·20 claims
- 0367US4868799AMeans for equalizing the internal pressure in an underwater transducer employing a vibratile piston to permit operation of the transducer at water depths in excess of a few hundred feetMASSA FRANK·Filed 1988·Granted Sep 19, 1989·45 cites·20 claims
- 0452US4859897ADirectional waterproof ultrasonic transducer for operating in airMASSA FRANK·Filed 1988·Granted Aug 22, 1989·13 cites·8 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →