Measuring and testing – Miscellaneous
Patent
1977-10-21
1978-09-19
Ruehl, Charles A.
Measuring and testing
Miscellaneous
73133R, G01L 516
Patent
active
RE0297658
ABSTRACT:
A writing instrument is provided which generates electrical signals indicative of the force applied and the direction of motion taken by the writing instrument as one is writing with it. The writing instrument uses strain gauges for providing these signals.
REFERENCES:
patent: 2848892 (1958-08-01), Hoffman
patent: 3023627 (1962-03-01), Geyling
patent: 3270260 (1966-08-01), Mehr
patent: 3341794 (1967-09-01), Stedman
patent: 3528295 (1970-09-01), Johnson et al.
patent: 3832895 (1974-09-01), Strandh
Andeen Gerry B.
Crane Hewitt D.
Taenzer Jon C.
Ruehl Charles A.
SRI - International
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