Philip T. Krein

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Portland, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Touch panel with discontinuities in touch sensitive surface
- Patent number 4,725,695
- Issue date Feb 16, 1988
- Tektronix, Inc.
- Bruce Murdock
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Touch panel with automatic nulling
- Patent number 4,707,845
- Issue date Nov 17, 1987
- Tektronix, Inc.
- Philip T. Krein
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Touch panel system
- Patent number 4,698,460
- Issue date Oct 6, 1987
- Tektronix, Inc.
- Philip T. Krein
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Touch panel with automatic frequency control
- Patent number 4,698,461
- Issue date Oct 6, 1987
- Tektronix, Inc.
- Robert D. Meadows
- G06 - COMPUTING CALCULATING COUNTING