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:
Dec. 08, 1983
Robert E Rector, Richardson, TX (US);
Larry T Taylor, Plano, TX (US);
Scott H Yarberry, Plano, TX (US);
Richard J Grassi, Royse City, TX (US);
Gulton Industries, Inc., Metuchen, NJ (US);
Abstract
A memory transfer unit is provided which permits replacing messages stored in a message display system with a different set of messages stored in the memory transfer unit. A circuit is provided for supplying power from the message display system to the memory transfer unit and for inhibiting operation of the memory transfer unit unless the power supply to it has a proper operating voltage level. Pulses produced in the message display system are counted to determine the sequential locations of data in the memory transfer unit to be transferred to the message display unit for substitution for data stored in the message display unit.