Emergency locator beacon for skis
Patent #: 4279433
Issued on: 07/21/1981
Inventor: Petaja
Staff-location and signalling system for use in mines
Patent #: 4495495
Issued on: 01/22/1985
Inventor: Ormanns , et al.
Personnel monitoring and locating system
Patent #: 4495496
Issued on: 01/22/1985
Inventor: Miller, III
Out-of-range personnel monitor and alarm
Patent #: 4593273
Issued on: 06/03/1986
Inventor: Narcisse
Patient tracking system
Patent #: 4814751
Issued on: 03/21/1989
Inventor: Hawkins , et al.
Safety device and method of establishing group communication
Patent #: 4833452
Issued on: 05/23/1989
Inventor: Currier
Infant security system
Patent #: 4853692
Issued on: 08/01/1989
Inventor: Wolk , et al.
Child monitoring device
Patent #: 4899135
Issued on: 02/06/1990
Inventor: Ghahariiran
Ultrasonic personnel location identification system
Patent #: 4955000
Issued on: 09/04/1990
Inventor: Nastrom
Method and device for deterring the unauthorized removal of a newborn from a defined area
Patent #: 5006830
Issued on: 04/09/1991
Inventor: Merritt
More ...
Communication system
Patent #: 5062151
Issued on: 10/29/1991
Inventor: Shipley
Mobile perimeter monitoring system
Patent #: 5086290
Issued on: 02/04/1992
Inventor: Murray, et al.
Electronic system and method for monitoring abusers for compliance with a protective order
Patent #: 5266944
Issued on: 11/30/1993
Inventor: Carroll, et al.
5291399
Location monitoring system
Patent #: 5357254
Issued on: 10/18/1994
Inventor: Kah, Jr.
Telemetered patient location system and method
Patent #: 5396224
Issued on: 03/07/1995
Inventor: Dukes, et al.
Electronic system and method for monitoring compliance with a protective order
Patent #: 5396227
Issued on: 03/07/1995
Inventor: Carroll, et al.
Means for locating a remote control device
Patent #: 5455560
Issued on: 10/03/1995
Inventor: Owen
System for identifying object locations
Patent #: 5455851
Issued on: 10/03/1995
Inventor: Chaco, et al.
Locator device useful for house arrest and stalker detection
Patent #: 5461390
Issued on: 10/24/1995
Inventor: Hoshen
Apparatus for automating routine communication in a facility
Patent #: 5465082
Issued on: 11/07/1995
Inventor: Chaco
System for surveillance of a fixed or movable object
Patent #: 5475367
Issued on: 12/12/1995
Inventor: Prevost
Telephone communication system having a locator
Patent #: 5515426
Issued on: 05/07/1996
Inventor: Yacenda, 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.
Arrestee monitoring with variable site boundaries
Patent #: 5568119
Issued on: 10/22/1996
Inventor: Schipper, et al.
Protocol and mechanism for primary and mutter mode communication for asset tracking
Patent #: 5588005
Issued on: 12/24/1996
Inventor: Ali, et al.
Patient care and communication system
Patent #: 5594786
Issued on: 01/14/1997
Inventor: Chaco, et al.
System for monitoring and locating a person within a preselected distance from a base-station
Patent #: 5621388
Issued on: 04/15/1997
Inventor: Sherburne, et al.
Location system
Patent #: 5635907
Issued on: 06/03/1997
Inventor: Bernard, et al.
Location based selective distribution of generally broadcast information
Patent #: 5636245
Issued on: 06/03/1997
Inventor: Ernst, et al.
Radio receiver for use in a radio tracking system and a method of operation thereof
Patent #: 5650769
Issued on: 07/22/1997
Inventor: Campana, Jr.
Self-locating remote monitoring systems
Patent #: 5650770
Issued on: 07/22/1997
Inventor: Schlager, et al.
Railcar location using mutter networks and locomotive transmitter during transit
Patent #: 5682139
Issued on: 10/28/1997
Inventor: Pradeep, et al.
Use of mutter mode in asset tracking for gathering data from cargo sensors
Patent #: 5686888
Issued on: 11/11/1997
Inventor: Welles, II, et al.
Communication system for communicating with tags
Patent #: 5686902
Issued on: 11/11/1997
Inventor: Reis, et al.
Patient care and communication system
Patent #: 5689229
Issued on: 11/18/1997
Inventor: Chaco, et al.
Local communication network for power reduction and enhanced reliability in a multiple node tracking system
Patent #: 5691980
Issued on: 11/25/1997
Inventor: Welles, II, et al.
Bed status information system for hospital beds
Patent #: 5699038
Issued on: 12/16/1997
Inventor: Ulrich, et al.
Method and apparatus for summoning police or security personnel for assistance in an emergency situation
Patent #: 5705980
Issued on: 01/06/1998
Inventor: Shapiro
System for tracking an article or person
Patent #: 5708421
Issued on: 01/13/1998
Inventor: Boyd
Portable tracking apparatus for continuous position determination of criminal offenders and victims
Patent #: 5731757
Issued on: 03/24/1998
Inventor: Layson, Jr.
Tag location monitor
Patent #: 5742237
Issued on: 04/21/1998
Inventor: Bledsoe
Accountability and theft protection via the global positioning system
Patent #: 5751246
Issued on: 05/12/1998
Inventor: Hertel
Patient tracking system for hospital emergency facility
Patent #: 5760704
Issued on: 06/02/1998
Inventor: Barton, et al.
Area security system
Patent #: 5793290
Issued on: 08/11/1998
Inventor: Eagleson, et al.
Personal security system with remote activation
Patent #: 5808564
Issued on: 09/15/1998
Inventor: Simms, et al.
Child locating and monitoring device
Patent #: 5812056
Issued on: 09/22/1998
Inventor: Law
Telephone communication system having a locator
Patent #: 5822418
Issued on: 10/13/1998
Inventor: Yacenda, et al.
Patient care and communication system
Patent #: 5822544
Issued on: 10/13/1998
Inventor: Chaco, et al.
Patient/nurse call system
Patent #: 5838223
Issued on: 11/17/1998
Inventor: Gallant, et al.
Telephone communication system having a locator and a scheduling facility
Patent #: 6009333
Issued on: 12/28/1999
Inventor: Chaco
Patient care and communication system
Patent #: 6259355
Issued on: 07/10/2001
Inventor: Chaco, et al.
RF remote appliance control/monitoring system
Patent #: 6275166
Issued on: 08/14/2001
Inventor: del Castillo, et al.
Multichannel audio distribution system having portable receivers
Patent #: 6300880
Issued on: 10/09/2001
Inventor: Sitnik
Wireless ground link-based aircraft data communication system with roaming feature
Patent #: 6308045
Issued on: 10/23/2001
Inventor: Wright, et al.
RE37531
September 30, 2019. 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.
