05583776 is referenced by 317 patents and cites 11 patents.

A microcomputer-assisted position finding system that integrates GPS data, dead reckoning sensors, and digital maps into a low-cost, self-contained navigation instrument is disclosed. A built-in radio frequency transponder allows individual positions to be monitored by a central coordinating facility. Unique dead reckoning sensors and features are disclosed for ground speed/distance measurement and computer-aided position fixes.

Title
Dead reckoning navigational system using accelerometer to measure foot impacts
Application Number
8/405087
Publication Number
5583776
Application Date
March 16, 1995
Publication Date
December 10, 1996
Inventor
Thomas Judd
Fountain Valley
CA, US
Robert W Levi
Anaheim
CA, US
Agent
Price Gess & Ubell
Assignee
Point Research Corporation
CA, US
IPC
G01C 22/00
View Original Source