Inventor · disambiguated record
Fred L. Katzmann
Also filed as: KATZMANN FRED L
10 granted patents·131 citations·filing 1975–1994
90Inventor score
Top patents by PatentIndex Score
10 records- 0177US5783805AElectrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signalsFiled 1994·Granted Jul 21, 1998·42 cites·33 claims
- 0271US4090632AAdjustable instrument caseBALLANTINE LAB·Filed 1977·Granted May 23, 1978·28 cites·23 claims
- 0363USD251370SElectronic instrument caseBALLANTINE LABORATORIES INC·Filed 1977·Granted Mar 20, 1979·8 cites·1 claims
- 0458US4000463ADirect-reading decibel meterBALLANTINE LAB·Filed 1975·Granted Dec 28, 1976·14 cites·11 claims
- 0556USD251368SElectronic instrument caseBALLANTINE LABORATORIES INC·Filed 1977·Granted Mar 20, 1979·6 cites·1 claims
- 0651USD251369SElectronic instrument caseBALLANTINE LABORATORIES INC·Filed 1977·Granted Mar 20, 1979·5 cites·1 claims
- 0744US4901006AMethod and apparatus for AC signal comparison, calibration and measurementELECTRO SCIENT IND INC·Filed 1989·Granted Feb 13, 1990·10 cites·11 claims
- 0841US4695793AResistive sensing thermal device for current measurementBALLANTINE LAB·Filed 1984·Granted Sep 22, 1987·7 cites·15 claims
- 0937US5378873AElectrothermal conversion elements, apparatus and methods for use in comparing, calibrating and measuring electrical signalsFiled 1992·Granted Jan 3, 1995·7 cites·17 claims
- 1027US4659910AAC-DC transfer standard temperature sensor reversal error compensation circuitHARRISON JR ARCHIE J·Filed 1985·Granted Apr 21, 1987·4 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →