Klaus R. Pichler

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Princeton, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Talking book with an infrared detector used to detect page turning
- Patent number 4,636,881
- Issue date Jan 13, 1987
- Shaw; James T.
- Paul E. Brefka
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS