Inventor · disambiguated record
Donald P. Northrop
Also filed as: NORTHROP DONALD · NORTHROP DONALD P
12 granted patents·1 pending application·403 citations·filing 1975–2006
93Inventor score
Top patents by PatentIndex Score
13 records- 0196US4758173ASocket adaptor for fluorescent lampDURO TEST CORP·Filed 1986·Granted Jul 19, 1988·131 cites·15 claims
- 0292US3988633AFluorescent lamp with envelope groovesDURO TEST CORP·Filed 1975·Granted Oct 26, 1976·45 cites·10 claims
- 0391US4924368AFluorescent lamp with protective shieldDURO TEST CORP·Filed 1989·Granted May 8, 1990·79 cites·16 claims
- 0488US4891550APhosphor blend for broad spectrum fluorescent lampDURO TEST CORP·Filed 1989·Granted Jan 2, 1990·48 cites·17 claims
- 0580US7300327B2Method for constructing a scotopic after-glow lampBOLTA CHARLES·Filed 2005·Granted Nov 27, 2007·8 cites·12 claims
- 0679US4745323ACompact fluorescent lamp with outer envelopeDURO TEST CORP·Filed 1986·Granted May 17, 1988·25 cites·8 claims
- 0778US4032813AFluorescent lamp with reduced wattage consumption having electrode shield with getter materialDURO TEST CORP·Filed 1975·Granted Jun 28, 1977·18 cites·7 claims
- 0866US6917154B2Scotopic after-glow lampFiled 2003·Granted Jul 12, 2005·9 cites·25 claims
- 0965US5122710ARare earth phosphor blends for fluorescent lamp using four to five phosphorsDURO TEST CORP·Filed 1989·Granted Jun 16, 1992·20 cites·12 claims
- 1052US2007284817A1Adult Board GameNORTHROP DONALD·Filed 2006·Application pending·0 cites
- 1150US4032814AFluorescent lamp with reduced wattage consumptionDURO TEST CORP·Filed 1975·Granted Jun 28, 1977·6 cites·5 claims
- 1249US4734616AFluoresent lamp with double cathode and probeDURO TEST CORP·Filed 1986·Granted Mar 29, 1988·7 cites·13 claims
- 1346US5498924AFluorescent lamp capable of operating on multiple ballast systemDURO TEST CORP·Filed 1995·Granted Mar 12, 1996·7 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →