U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Binary digital pager having an eight function code read-out

Patent 4160240 Issued on July 3, 1979. Estimated Expiration Date: Icon_subject January 13, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3801956

3855576

3914741

Vital digital communication system Patent #: 4090173
Issued on: 05/16/1978
Inventor: Sibley

Inventor

Assignee

Application

No. 05/869394 filed on 01/13/1978

US Classes:

340/7.32, Power control or battery saving340/146.2, DIGITAL COMPARATOR SYSTEMS340/7.39, Programming the receiver340/825.37, Additional to other selective control714/48, Error detection or notification714/743, Addressing714/823True and complement data

Examiners

Primary: Yusko, Donald J.

Attorney, Agent or Firm

International Classes

H04Q 7/16 (20060101)
G08B 5/22 (20060101)

Abstract

A read-out of eight distinct function codes is obtained in a pager or similar device having a single two-word address code plug by creating a second, but dependent, address within the pager and transmitting one of eight possible variants of the two words of the two address codes and their complements. Two code plugs may also be used to provide two addresses with four function codes associated with each. Upon receipt of a coded address, the user is alerted, and the function code is stored in a write-over memory, available to be read-out on command unitl a new code is received. The memory can also be erased manually as desired. Display segments are scanned in sequence to conserve power, and a status check of the segments is provided at each power turn-on. Power status indication is also provided, at turn-on and at "read" command, utilizing both audio alert channels and the visual display elements.

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