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:
Nov. 28, 1989
Filed:
May. 11, 1988
John A Robertson, Chillicothe, OH (US);
Telesis Controls Corporation, Chillicothe, OH (US);
Abstract
Fonts of characters of an alphabetic and numerical set thereof are described wherein each character of a set is formed from a dot-like pixel matrix and exhibits a predetermined constant and equal number of pixels. Any illegal alteration of the characters of the font set is avoided by forming the dot-like pixels defining a character in permanent fashion as by indentation in the surface of the article to be marked such that pixels cannot be erased, but only added. The pixels within the top and bottom three rows of each character of the font sets form a pattern unique to that character so that the identity of the character may be recovered if a portion of it is lost. A security encryption technique becomes available through the use of characters from two font formats.