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:
Feb. 14, 1989
Filed:
Jan. 29, 1987
Shigeo Yoshizawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A selective calling radio pager comprising a circuit that receives a calling address signal transmitted on a radio channel and generates a flashing signal in response to the calling address signal. A control circuit is provided for writing the received calling address signal into a memory in response to the receiving circuit and reading the calling address signal from the memory in response to a manual command signal. The pager is provided with a light-emitting diode which is responsive to the flashing signal and the calling address signal read out of the memory for supplying an optical signal to an external device. The external device is provided with a photodetector for converting the optical signal to a corresponding electrical signal and a second light-emitting diode responsive to an output signal from the photodetector for giving visual alarm indication when the pager is placed on the external device.