IR/RF locator

JW Crimmins, JL Saulnier - US Patent 5,917,425, 1999 - Google Patents
An infrared (IR) article or person locator system is described Wherein a plurality of stationary
units are distributed in Zones throughout an enclosure. The article or person carries a …

Infrared personnel locator system

LL White - US Patent 4,275,385, 1981 - Google Patents
Electronics, 12/22/77, Two-Chip Set Uses Infrared Pulse to Control TVs, p. 119. GE-Tech.
Training Man., TV 1978 Line, 7/1977, Remote/Electronic Tuning Syst., pp.-l-2, 6-9. LED Ckts …

Infrared communicating device

JW Crimmins, JL Saulnier - US Patent 5,621,384, 1997 - Google Patents
BACKGROUND OF THE INVENTION Some businesses have a need to monitor the
locations of people or equipment. For example, hospitals might desire to monitor the location …

Proximity detection for telecommunications features

WA Davidson, DH Larson - US Patent 4,932,050, 1990 - Google Patents
A multitude of customized services are presently available for serving telephone customer
needs. Illustra tive of such a service is a call forwarding feature which enables a customer to …

Locating system and method

RT Shipley - US Patent App. 08/144,746, 1995 - Google Patents
Personnel locating system for use in a facility having a [63] Continuation of Ser. No. 856,646,
Apr. 25, 1986, plurality of rooms having doorways therein comprised abandoned, which is a …

Personnel locator system

BL Guest, LC Laney, DK Fredrickson - US Patent 4,990,892, 1991 - Google Patents
[57] ABSTRACT A personnel locator system for monitoring the locations of classes of
personnel. Members of classes of personnel carry portable, infrared transmitters which …

Personal paging, communications, and locating system

CA Will - US Patent 5,588,009, 1996 - Google Patents
57 ABSTRACT A method and apparatus for sending paging signals and messages to
individuals within a building and accepting responses to the messages. Messages may be …

Wireless personal paging, communications, and locating system

CA Will - US Patent 5,479,408, 1995 - Google Patents
A method and apparatus for sending paging signals and messages to individuals within a
building and accepting responses to the messages. Messages may be initiated by electronic …

Communication system

RT Shipley - US Patent 4,601,064, 1986 - Google Patents
(57) ABSTRACT A communications system provides for the location or tracking of persons or
objects to automatically establish two-way conversation with the person located via an …

Personnel locator

WF Simon, WC Torrey, CW Hull - US Patent 4,225,953, 1980 - Google Patents
BACKGROUND OF THE INVENTION The present invention pertains to the? eld of person
nel locating systems. Systems of this general type have been proposed in the prior art for …