Assignee
GROFF JAMES W
6 granted patents·291 citations·filing 1981–1985
Top patents by PatentIndex Score
6 records- 0188US4493655ARadio-controlled teaching deviceGROFF JAMES W·Filed 1983·Granted Jan 15, 1985·60 cites·12 claims
- 0287US4446334ATelephone number coding deviceGROFF JAMES W·Filed 1983·Granted May 1, 1984·64 cites·16 claims
- 0385US4586905AComputer-assisted audio/visual teaching systemGROFF JAMES W·Filed 1985·Granted May 6, 1986·90 cites·12 claims
- 0481US4405839ATimed telephone ring silencer deviceGROFF JAMES W·Filed 1982·Granted Sep 20, 1983·39 cites·4 claims
- 0561US4346374AClassroom noise alarmGROFF JAMES W·Filed 1981·Granted Aug 24, 1982·22 cites·4 claims
- 0647US4654642ATamperproof classroom noise alarmGROFF JAMES W·Filed 1985·Granted Mar 31, 1987·16 cites·12 claims
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