The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1977
Filed:
Apr. 15, 1976
Applicant:
Inventors:
Tutomu Nakamura, Akashi, JA;
Takehiko Sasaki, Yamatokoriyama, JA;
Masaji Yonekawa, Sakurai, JA;
Hidetoshi Maeda, Tenri, JA;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ; G04B / ; H01H / ;
U.S. Cl.
CPC ...
364705 ; 58 5 / ; 5815 / ; 307116 ; 3403 / ; 364709 ;
Abstract
In a combination wristwatch and calculator, a key input means for information entry employs a touch sensitive electronic switching circuitry comprising a C-MOS inverter. One electrode for the touch sensitive electronic switching circuitry is provided on the front panel of the combination wristwatch and calculator, whereas another electrode for the touch sensitive electronic switching circuitry is positioned on the rear surface of the combination wristwatch and calculator. The present key input means is equally applicable to a miniature electronic calculator.