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. 30, 1996
Filed:
May. 04, 1994
Applicant:
Inventor:
Chao M Kang, San Diego, CA (US);
Assignee:
H. M. Electronics, Inc., San Diego, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08G / ;
U.S. Cl.
CPC ...
340941 ; 340933 ; 340939 ; 364436 ;
Abstract
A method and apparatus for detecting objects disposed in close proximity to a conductive loop, includes the use of a sensitivity selection circuit to compensate for loop sensitivity to metal and other conditions, and a microprocessor circuit for helping to prevent false detections or undesired interruptions of valid detection due to changes in environmental conditions.