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. 23, 1996
Filed:
May. 07, 1993
Applicant:
Inventor:
James C Davis, Jr, Carlisle, MA (US);
Assignee:
Brooks Automation, Inc., Chelmsford, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G01N / ;
U.S. Cl.
CPC ...
324690 ; 331 65 ; 324688 ; 324663 ;
Abstract
The presence of an article at a specified location is detected by measuring a change in capacitance which is caused by the placement of the article at the specified location. The device used for this measurement includes an oscillator the frequency whereof is rendered highly sensitive to the capacitance being measured by structure which includes a triaxial cable and by electrical circuitry which includes a voltage follower circuit.
Davis, Jr, James. (1996). Sensor for articles such as wafers on end effector (U.S. Patent No. 5539323). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5539323
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile