Inventor · disambiguated record
Christiaan H. F. Velzel
Also filed as: VELZEL CHRISTIAAN H F · VELZEL CHRISTIAAN HENDRIKS FRA
2 granted patents·16 citations·filing 1975–1994
58Inventor score
Files withPHILIPS CORP2
Top patents by PatentIndex Score
2 records- 0149US4038679AApparatus for reading an optically recorded record carrier provided with periodic surface undulations and for deriving a focussing control signal from such surface undulationsPHILIPS CORP·Filed 1975·Granted Jul 26, 1977·7 cites·1 claims
- 0240US5512760AOptical height detector with coaxial irradiation and image axes and plural detectors spaced along the image axisPHILIPS CORP·Filed 1994·Granted Apr 30, 1996·9 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →