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:
Aug. 07, 1990
Filed:
Oct. 19, 1989
Applicant:
Inventors:
Gad J Shaanan, Westmount, CA;
George V Lenaerts, London, CA;
Ian D Buchanan, London, CA;
Anthony M Smith, London, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
379355 ; 379440 ;
Abstract
A shutter mechanism for a telephone directory that stores telephone numbers to be dialed. The directory has physical spaces for the entry of descriptive labels (e.g. names). The shutter mechanism has a first planar surface for providing these physical spaces. It has a second planar surface overlying the first surface. The second surface is divided into alternating opaque and transparent sections such that the surface having the names can be moved underneath the second surface such that the names can be hidden by the opaque sections or revealed by the transparent sections.