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:
Feb. 08, 1994
Filed:
May. 07, 1992
Applicant:
Inventor:
Max E Reeb, D-7320 Goppingen, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340572 ; 29846 ; 333219 ; 428901 ;
Abstract
A planar LC marker construction useful as an electromagnetically interrogatable transponder is comprised of at least two conductive paths forming planar clockwise and counterclockwise turning spiral patterns (if viewed from the same side) aligned face-to-face, and turn by turn, in opposition to each other, and spaced by an insulative layer. The layer may have various components, at least one of which may be an adhesive layer to co-perform a capacitive function at radio frequency. At least in part that layer may configure as a sheet. The construction features a superior in-system detectivity owing to a very low RF electromagnetic field deflection, and can be produced cheaply for one-time use.