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:
Jul. 08, 1986
Filed:
Oct. 31, 1983
Applicant:
Inventor:
Lawrence R Hill, New York, NY (US);
Assignee:
General Instrument Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
3403 / ; 178 / ; 3403 / ; 400477 ;
Abstract
An acoustic keyboard comprises a plurality of keys arranged in a matrix. A plurality of reflector members, each one associated with a different one of the keys, reflect acoustic energy when the associated key is actuated. Acoustic energy is emitted from a transducer for reflection from the actuators. The reflected energy is detected, and the actuated key is identified based upon the transit time of acoustic energy from the transducer to the detector via reflection off of the reflector member associated with the actuated key.