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:
Dec. 31, 1991
Filed:
Dec. 13, 1989
Applicant:
Inventor:
William L Petersen, Laguna Niguel, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
359809 ; 351175 ; 359811 ; 359601 ; 359831 ;
Abstract
An adjustable Pd lens frame carries a pair of prism lenses is adjustably positioned to a normal stationary position with respect to a computer monitor screen. The lenses provide 'base in' for each eye and plus optical power to reduce both accommodative demand and convergence demand.