Inventor · disambiguated record
Robertus A. J. Keijser
Also filed as: DERKSEMA BRAM J · KEIJSER ROBERTUS A J · KEIJSER ROBERTUS ANTONIUS J · KEIJSER ROBERTUS ANTONIUS JOHANNES
8 granted patents·3 pending applications·100 citations·filing 1978–2008
86Inventor score
Top patents by PatentIndex Score
11 records- 0181US6300729B1Metal halide lamp with increased lamp voltagePHILIPS CORP·Filed 2000·Granted Oct 9, 2001·29 cites·12 claims
- 0258US5923127AHigh-pressure discharge lamp with miniature discharge vessel and integrated circuitryPHILIPS CORP·Filed 1997·Granted Jul 13, 1999·29 cites·12 claims
- 0355US5153482AHigh-pressure sodium discharge lampPHILIPS CORP·Filed 1991·Granted Oct 6, 1992·15 cites·10 claims
- 0452US5097176AHigh-pressure sodium discharge lamp having a color temperature of at least 2800° K.PHILIPS CORP·Filed 1991·Granted Mar 17, 1992·12 cites·9 claims
- 0542US2010026210A1Apparatus for driving a gas discharge lampKONINKL PHILIPS ELECTRONICS NV·Filed 2008·Application pending·0 cites
- 0638US2008231206A1Method and Ballast for Driving a High-Pressure Gas Discharge LampKONINKL PHILIPS ELECTRONICS NV·Filed 2005·Application pending·0 cites
- 0737US2005104500A1Discharge lampKONINKL PHILIPS ELECTRONICS NV·Filed 2002·Application pending·0 cites
- 0831US4213100AGas discharge laserPHILIPS CORP·Filed 1978·Granted Jul 15, 1980·2 cites·7 claims
- 0930US5103141ASwitching arrangement for increasing the white life of a high pressure sodium lampPHILIPS CORP·Filed 1991·Granted Apr 7, 1992·7 cites·15 claims
- 1030US4152673AGas discharge laserPHILIPS CORP·Filed 1978·Granted May 1, 1979·1 cites·3 claims
- 1128US5461285ASwitching arrangementPHILIPS CORP·Filed 1990·Granted Oct 24, 1995·5 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →