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. 29, 1986
Filed:
May. 16, 1984
Applicant:
Inventor:
John L Hughes, Canberra, AU;
Assignee:
Australian Electro Optics Pty. Limited, Canberra, AU;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ; G01D / ;
U.S. Cl.
CPC ...
346-11 ; 346108 ; 3461 / ; 358237 ;
Abstract
The invention concerns a system for marking information on items particularly mass produced items. The message to be marked is generated on a high resolution cathode ray tube screen. The image is then coupled into the input end of a liquid crystal light valve and the incoherent image converted to a coherent image by using a laser beam and then separated by a light polarizer into positive and negative images. The separated images are then used to mark a message on the surface of an object.