Inventor · disambiguated record
Wilhelmus F. Knippenberg
Also filed as: HAGEN SIEGFRIED H · KNIPPENBERG WILHELMUS F · KNIPPENBERG WILHELMUS FRANCISC · SCHELHAS KARLHEINZ
9 granted patents·96 citations·filing 1972–1983
88Inventor score
Files withPHILIPS CORP9
Top patents by PatentIndex Score
9 records- 0186US4013503AFilamentary silicon carbide crystals by VLS growth in molten ironPHILIPS CORP·Filed 1975·Granted Mar 22, 1977·30 cites·5 claims
- 0269US4204769ACuvette for flameless atom absorption spectroscopyPHILIPS CORP·Filed 1978·Granted May 27, 1980·19 cites·8 claims
- 0356US4629320ACuvette for the atomic absorption spectrometryPHILIPS CORP·Filed 1983·Granted Dec 16, 1986·13 cites·5 claims
- 0456US4086559AElectric resistor based on silicon carbide having a negative temperature coefficientPHILIPS CORP·Filed 1975·Granted Apr 25, 1978·8 cites·8 claims
- 0556US3962406AMethod of manufacturing silicon carbide crystalsPHILIPS CORP·Filed 1972·Granted Jun 8, 1976·9 cites·8 claims
- 0649US4208449AMethod of making an electric resistor having a resistance body consisting of silicon carbide having a negative temperature coefficientPHILIPS CORP·Filed 1978·Granted Jun 17, 1980·6 cites·8 claims
- 0741US4280049AX-ray spectrometerPHILIPS CORP·Filed 1979·Granted Jul 21, 1981·5 cites·7 claims
- 0837US4547069ATubular cuvette for atomic absorption spectrometryPHILIPS CORP·Filed 1983·Granted Oct 15, 1985·5 cites·9 claims
- 0930US4367246AMethods of manufacturing crucible for flameless atomic absorption spectroscopyPHILIPS CORP·Filed 1981·Granted Jan 4, 1983·1 cites·4 claims
Join the waitlist — get patent alerts
Get an alert when Wilhelmus F. Knippenberg files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →