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. 12, 2000
Filed:
Jan. 10, 1997
Richard Marquardt, Jr, Clarks Green, PA (US);
Christopher Cookson, Los Angeles, CA (US);
Anthony Pietrzykoski, Plains, PA (US);
John L Orehotsky, Dallas, PA (US);
Deborah H Carey, Wyoming, PA (US);
Howard Price, Norfolk, VA (US);
Daniel M Pindzola, Berwyn, PA (US);
WEA Manufacturing, Inc., Olyphant, PA (US);
Abstract
A double sided (or higher multiple sided) data storing compact disc for optically recorded data has data surfaces that are separated by a thin film of wavelength selective material that passes light of one frequency and reflects light of a second (or multiple) frequency. The thin film either passively relies upon the inherent interference between light signals reflected from its upper and lower surfaces or is an active material that reflects light of one frequency and transmits light of a second frequency. A further aspect of the present invention is the method for the manufacture of such a multi-surfaced disc.