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. 22, 1991
Filed:
Jun. 03, 1985
George Barry, Saratoga, CA (US);
Seven Oaks Corporation, Saratoga, CA (US);
Abstract
A cursor-aiming system for use with a screen having a movable cursor is provided with means for generating a field and means for changing the position of the cursor on the screen in response to the movement of an operator's finger in the field. In one embodiment there is provided a plurality of monostatic sonars and in another embodiment there is provided a plurality of bistatic sonars. The sonars are mounted for the transmission and reception of acoustic signals through apertures located in a spaced relationship along the upper margin of a terminal keyboard. In typical embodiments the signal frequency is approximately 200 KHz. Either pulsed or continuous-wave signals may be employed. When pulses are used, a typical pulse rate is 200 pps with a pulse width of 25 microseconds. Multiple frequency systems comprise alternate pulses of 200 and 250 KHz. Interpulse intervals are dithered to discriminate against around-the-timebase echoes.