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:
Jan. 27, 2015
Filed:
Aug. 13, 2012
Applicants:
Geoff Yunker, Vero Beach, FL (US);
Walter V. Raczynski, V, Arlington Heights, IL (US);
Charles L. Zimnicki, Lake Zurich, IL (US);
Inventors:
Geoff Yunker, Vero Beach, FL (US);
Walter V. Raczynski, V, Arlington Heights, IL (US);
Charles L. Zimnicki, Lake Zurich, IL (US);
Assignees:
Tracthat LLC, Milwaukee, WI (US);
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R 35/00 (2006.01); H03K 17/96 (2006.01);
U.S. Cl.
CPC ...
H03K 17/962 (2013.01); H03K 2217/960755 (2013.01);
Abstract
An auto-calibrated proximity sensor used with a protected item in a retail display security system includes a metalized surface that cooperatively interacts with a printed circuit board to form a capacitive cell. A microcontroller senses changes in the frequency of the capacitive circuit if the orientation of the metalized surface changes with respect to the printed circuit board.