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:
May. 23, 1978
Filed:
May. 28, 1975
Applicant:
Inventor:
Richard E Fayling, White Bear Lake, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G06K / ; G11B / ;
U.S. Cl.
CPC ...
235493 ; 360-2 ;
Abstract
A magnetizable layer having an H.sub.c of at least 3000 oersteds pre-encoded with digital data is permanently bonded to the face of a document and has a permanent protective overlayer which, if magnetizable, has relatively low H.sub.c and can be used for recording transaction data.