Robert A. Johnson

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Tustin, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Longitudinally-coupled saw filter with enhanced frequency selectivity
- Patent number 6,417,746
- Issue date Jul 9, 2002
- Conexant Systems, Inc.
- Robert A. Johnson
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Electromechanical resonator apparatus
- Patent number 4,553,060
- Issue date Nov 12, 1985
- Rockwell International Corporation
- William J. Domino
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Mechanical filter with box-type coupling structure
- Patent number 4,405,909
- Issue date Sep 20, 1983
- Rockwell International Corporation
- Robert A. Johnson
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Bandpass mechanical filter
- Patent number 4,306,204
- Issue date Dec 15, 1981
- Rockwell International Corporation
- Robert A. Johnson
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Longitudinal-mode mechanical bandpass filter
- Patent number 3,983,516
- Issue date Sep 28, 1976
- Rockwell International Corporation
- Robert A. Johnson
- H03 - BASIC ELECTRONIC CIRCUITRY