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:
Mar. 24, 1987
Filed:
Mar. 19, 1985
Harry R Rasmussen, Puyallup, WA (US);
Dan M Percival, Maple Valley, WA (US);
John D Hoskinson, Summer, WA (US);
Charles Nickerson, Poulsbo, WA (US);
Other;
Abstract
An LCD is associated with each phone line. The LCD is powered by the system current in the phone line. When the phone (10) is in an 'on-hook' condition, the LCD is energized and it displays a light image of a telephone in an on-hook condition on a solid dark background. When the phone (10) is in an off-hook condition the LCD is turned off causing its liquid crystal compound to become transparent. The LCD working displays a solid light color but an image of a handset appears on this background. This handset image is printed onto the back side of the front glass panel of the LCD in the region that appears as a dark background when the LCD is energized. When a ring is received by the line the LCD flashes back and forth between the two displays at a fast rate. When the line is 'on-hold' the LCD flashes between the images at a slower rate.