3439320
3739329
Low-power, infrared information transmission system
Patent #: 4151407
Issued on: 04/24/1979
Inventor: McBride , et al.
Patient monitoring and data processing system
Patent #: 4216462
Issued on: 08/05/1980
Inventor: McGrath , et al.
Personnel locator
Patent #: 4225953
Issued on: 09/30/1980
Inventor: Simon , et al.
Infrared personnel locator system
Patent #: 4275385
Issued on: 06/23/1981
Inventor: White
Communication system
Patent #: 4601064
Issued on: 07/15/1986
Inventor: Shipley
Electronic locating system for persons receiving telephone calls
Patent #: 4649385
Issued on: 03/10/1987
Inventor: Aires , et al.
Remote access personnel identification and tracking system
Patent #: 4837568
Issued on: 06/06/1989
Inventor: Snaper
Hospital signaling and communications system
Patent #: 4967195
Issued on: 10/30/1990
Inventor: Shipley
More ...
Personnel locator system
Patent #: 4990892
Issued on: 02/05/1991
Inventor: Guest, et al.
Apparatus and method for position reporting
Patent #: 5027314
Issued on: 06/25/1991
Inventor: Linwood, et al.
Locating system
Patent #: 5051741
Issued on: 09/24/1991
Inventor: Wesby
Communication system
Patent #: 5062151
Issued on: 10/29/1991
Inventor: Shipley
Location system adapted for use in multipath environments
Patent #: 5119104
Issued on: 06/02/1992
Inventor: Heller
Miniature multilead biotelemetry and patient location system
Patent #: 5153584
Issued on: 10/06/1992
Inventor: Engira
Method and system for monitoring personnel
Patent #: 5218344
Issued on: 06/08/1993
Inventor: Ricketts
5291399
Dual mode electronic identification system
Patent #: 5317309
Issued on: 05/31/1994
Inventor: Vercellotti, et al.
Network for portable patient monitoring devices
Patent #: 5319363
Issued on: 06/07/1994
Inventor: Welch, et al.
Method and apparatus for providing a personal locator, access control and asset tracking service using an in-building telephone network
Patent #: 5363425
Issued on: 11/08/1994
Inventor: Mufti, et al.
Method for receiving and transmitting optical data and control information to and from remotely located receivers and transmitters in an optical locator system
Patent #: 5387993
Issued on: 02/07/1995
Inventor: Heller, et al.
Health support system
Patent #: 5390238
Issued on: 02/14/1995
Inventor: Kirk, et al.
Telemetered patient location system and method
Patent #: 5396224
Issued on: 03/07/1995
Inventor: Dukes, et al.
Carrier locating system
Patent #: 5402469
Issued on: 03/28/1995
Inventor: Hopper, et al.
Patient monitoring system
Patent #: 5417222
Issued on: 05/23/1995
Inventor: Dempsey, et al.
Intelligent locator system with multiple bits represented in each pulse
Patent #: 5426425
Issued on: 06/20/1995
Inventor: Conrad, et al.
System for identifying object locations
Patent #: 5455851
Issued on: 10/03/1995
Inventor: Chaco, et al.
System for monitoring patient location and data
Patent #: 5458123
Issued on: 10/17/1995
Inventor: Unger
Apparatus for automating routine communication in a facility
Patent #: 5465082
Issued on: 11/07/1995
Inventor: Chaco
Occlusion detection system for locator devices
Patent #: 5471404
Issued on: 11/28/1995
Inventor: Mazer
Locating and authentication system
Patent #: 5493283
Issued on: 02/20/1996
Inventor: Hopper, et al.
Telephone communication system having a locator
Patent #: 5515426
Issued on: 05/07/1996
Inventor: Yacenda, et al.
Multipath tolerant location system and method therefor
Patent #: 5534876
Issued on: 07/09/1996
Inventor: Erickson, et al.
Security system for controlling building access
Patent #: 5541585
Issued on: 07/30/1996
Inventor: Duhame, et al.
Method and apparatus for locating personnel and objects in response to telephone inquiries
Patent #: 5548637
Issued on: 08/20/1996
Inventor: Heller, et al.
Patient/nurse call system
Patent #: 5561412
Issued on: 10/01/1996
Inventor: Novak, ;, , , --> Novak, et al.
Sensory and control system for local area networks
Patent #: 5572195
Issued on: 11/05/1996
Inventor: Heller, et al.
Medical alert distribution system with selective filtering of medical information
Patent #: 5576952
Issued on: 11/19/1996
Inventor: Stutman, et al.
Personal paging, communications, and locating system
Patent #: 5588009
Issued on: 12/24/1996
Inventor: Will
Patient care and communication system
Patent #: 5594786
Issued on: 01/14/1997
Inventor: Chaco, et al.
Infrared locator system
Patent #: 5627524
Issued on: 05/06/1997
Inventor: Fredrickson, et al.
Optical data communication and location apparatus, system and method and transmitters and receivers for use therewith
Patent #: 5633742
Issued on: 05/27/1997
Inventor: Shipley
Patient care and communication system
Patent #: 5689229
Issued on: 11/18/1997
Inventor: Chaco, et al.
Personal security and tracking system Patent #: 5742233
Issued on: 04/21/1998
Inventor: Hoffman, et al.
January 7, 2020. 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.
