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:
Jun. 04, 1991
Filed:
Dec. 20, 1988
Applicant:
Inventors:
Hewitt D Crane, Portola Valley, CA (US);
Robert W Hammon, San Jose, CA (US);
Assignee:
SRI International, Inc., Menlo Park, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382-2 ; 382-3 ; 382 13 ; 382 17 ; 382 59 ;
Abstract
An apparatus for collecting information directly at a point on a surface comprises the combination of a stylus with means for sensing force along at least one axis in a surface at a point on the surface and a position sensing platen or pad with means for sensing a true position along at least one axis on the surface at the point in question. Collected information is processed to obtain figures of merit. Features extraction or rubbery correlation in five dimensions may be employed to obtain suitable figures of merit for objective evaluation.