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:
Apr. 08, 1980
Filed:
Jan. 18, 1978
John W McMullen, Provo, UT (US);
Rex A Wadham, Provo, UT (US);
Brigham Young University, Provo, UT (US);
Abstract
A portable data recorder for recording time-related information on tape cassettes. The recorder includes a briefcase shell in which the other components are mounted, a keyboard having a plurality of keys each of which, when depressed, produces a signal, and a plurality of key lines each coupled to a different one of the keys for carrying the signals produced thereby. A multiplexer, under control of a microprocessor, sequentially samples the key lines and transfers to the microprocessor any signals present on the key lines. The microprocessor then records on a cassette recorder data indicating whether or not a signal was present on each of the key lines sampled, and the time of sampling the key lines. The multiplexer successively samples the plurality of key lines so that both the identity of the keys depressed and the time duration of depression of the keys are recorded.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile