David M. Stern

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Merion Station, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Error compensating instrument system with digital communications
- Patent number 5,510,779
- Issue date Apr 23, 1996
- Drexelbrook Controls, Inc.
- Frederick L. Maltby
- G08 - SIGNALLING
Information Patent Grant
Two-wire compensated level measuring instrument
- Patent number 5,049,878
- Issue date Sep 17, 1991
- Drexelbrook Engineering Company
- David M. Stern
- G01 - MEASURING TESTING
Information Patent Grant
Two-wire level measuring instrument
- Patent number 4,851,831
- Issue date Jul 25, 1989
- Drexelbrook Engineering Co.
- David M. Stern
- G01 - MEASURING TESTING
Information Patent Grant
Two-wire level measuring instrument
- Patent number 4,485,673
- Issue date Dec 4, 1984
- Drexelbrook Engineering Company
- David M. Stern
- G01 - MEASURING TESTING
Information Patent Grant
System and method for obtaining compensated level measurements
- Patent number 4,235,106
- Issue date Nov 25, 1980
- Drexelbrook Controls, Inc.
- Frederick L. Maltby
- G01 - MEASURING TESTING