Individual holder
GRISHAM FRED A
US·3 granted patents·71 citations·filing 1989–1989
Individually held — no corporate assignee on record.
Technology mixE06B3
Top patents by PatentIndex Score
3 records- 0173US4850144ADoor extension apparatusGRISHAM FRED A·Filed 1989·Granted Jul 25, 1989·45 cites·5 claims
- 0247US4888924ADoor frame extension assemblyGRISHAM FRED A·Filed 1989·Granted Dec 26, 1989·20 cites·6 claims
- 0328US4949771ASteel security door frameGRISHAM FRED A·Filed 1989·Granted Aug 21, 1990·6 cites·3 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →