Inventor · disambiguated record
Rudolph H. Engelmann
Also filed as: ENGELMANN RUDOLPH H
10 granted patents·298 citations·filing 1977–1989
91Inventor score
Top patents by PatentIndex Score
10 records- 0192US4717889APower control system for periodically and selectively energizing or shorting primary windings of transformers for controlling the output voltage across a common secondary windingELECTRO VOICE·Filed 1986·Granted Jan 5, 1988·52 cites·19 claims
- 0285US4673888APower control systemELECTRO VOICE·Filed 1986·Granted Jun 16, 1987·81 cites·17 claims
- 0372US4219872APower supplyJAMES VON BANK·Filed 1978·Granted Aug 26, 1980·23 cites·24 claims
- 0468US4279852AIndicia producing methodENGELMANN RUDOLPH H·Filed 1980·Granted Jul 21, 1981·22 cites·8 claims
- 0565US4716353ABattery chargerELECTRO VOICE·Filed 1986·Granted Dec 29, 1987·39 cites·14 claims
- 0664US4987385AHigh efficiency power amplifierENGELMANN RUDOLPH H·Filed 1989·Granted Jan 22, 1991·15 cites·20 claims
- 0760US4138607ADual priority temperature controlPAKO CORP·Filed 1977·Granted Feb 6, 1979·24 cites·23 claims
- 0858US4982148APower factor maintenance systemENGELMANN RUDOLPH H·Filed 1989·Granted Jan 1, 1991·12 cites·32 claims
- 0950US4130819AOptical character recognition deviceSEIFRIED HILDEGARDE·Filed 1977·Granted Dec 19, 1978·10 cites·32 claims
- 1048US4779035AEnd of charge detectorELECTRO VOICE·Filed 1986·Granted Oct 18, 1988·20 cites·10 claims
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