John K. Carstedt

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Round Rock, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Touch input device having digital ambient light sampling
- Patent number 4,943,806
- Issue date Jul 24, 1990
- Carroll Touch Inc
- Timothy E. Masters
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Signal preconditioning for touch entry device
- Patent number 4,684,801
- Issue date Aug 4, 1987
- Carroll Touch Inc
- Arthur B. Carroll
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Early fault detection in an opto-matrix touch input device
- Patent number 4,645,920
- Issue date Feb 24, 1987
- Carroll Touch, Inc.
- Arthur B. Carroll
- G06 - COMPUTING CALCULATING COUNTING