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. 16, 1985
Filed:
Feb. 14, 1983
Warren R Pitts, Needham, MA (US);
Herbert W Salit, Ashland, MA (US);
Dennison Mfg. Company, Framingham, MA (US);
Abstract
An electrosensitive security laminate including a magnetic layer providing a magnetically encodable substrate. The laminate includes a base layer such as paper, a magnetic layer deposited on the base layer, and a vapor deposited metallic layer either over the magnetic layer or the opposite face of the base layer. Additional security may be achieved by including a decorative intermediate layer having a visibly nonuniform pattern. The user may detect a magnetically encoded pattern using a device which forms a visible pattern in accordance with any magnetic field adjacent the laminate. The patterned intermediate layer where included may be selectively exposed by electrically imprinting the metallized layer, thereby exposing a background pattern within any inscribed indicia.