Individual holder
SONG CHANG J
CA·8 granted patents·176 citations·filing 1980–1995
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
8 records- 0180US5181927AFrame lock mechanism for a key lightSONG CHANG J·Filed 1991·Granted Jan 26, 1993·50 cites·13 claims
- 0276US4787016ALight attachable to a keySONG CHANG J·Filed 1987·Granted Nov 22, 1988·38 cites·15 claims
- 0360US5365760AKey security deviceSONG CHANG J·Filed 1994·Granted Nov 22, 1994·27 cites·7 claims
- 0458US5031420APendant connectorSONG CHANG J·Filed 1990·Granted Jul 16, 1991·29 cites·4 claims
- 0555USD304130SAttachable key lightSONG CHANG J·Filed 1987·Granted Oct 24, 1989·7 cites·1 claims
- 0650US4277866AJewelry clasp and methodSONG CHANG J·Filed 1980·Granted Jul 14, 1981·16 cites·2 claims
- 0747USD371999SKey ringSONG CHANG J·Filed 1995·Granted Jul 23, 1996·6 cites·1 claims
- 0838USD371903SKey ringSONG CHANG J·Filed 1995·Granted Jul 23, 1996·3 cites·1 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →