Leo Spiegel

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Sharon, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Digital signal processing for linearization of small input signals...
- Patent number 5,617,058
- Issue date Apr 1, 1997
- Apogee Technology, Inc.
- Andrew A. Adrian
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Acoustical ribbon transducer loudspeaker system
- Patent number 5,195,143
- Issue date Mar 16, 1993
- Apogee Acoustics, Inc.
- Leo Spiegel
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ribbon speaker system
- Patent number 4,550,228
- Issue date Oct 29, 1985
- Apogee Acoustics, Inc.
- Gary E. Walker
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Inertial borehole survey system
- Patent number 4,537,067
- Issue date Aug 27, 1985
- Wilson Industries, Inc.
- Harper E. Sharp
- E21 - EARTH DRILLING MINING
Information Patent Grant
Inertial borehole survey system
- Patent number 4,454,756
- Issue date Jun 19, 1984
- Wilson Industries, Inc.
- Harper E. Sharp
- E21 - EARTH DRILLING MINING
Information Patent Grant
Digitized displacement transducer
- Patent number 4,364,045
- Issue date Dec 14, 1982
- Northrop Corporation
- Leo Spiegel
- G01 - MEASURING TESTING
Information Patent Grant
Solenoid torquer system
- Patent number 4,274,040
- Issue date Jun 16, 1981
- Northrop Corporation
- Leo Spiegel
- G01 - MEASURING TESTING