04371945 is referenced by 173 patents and cites 7 patents.

A pedometer is disclosed which calculates the distance a user walks, jogs or runs by electronically measuring the length of each stride taken by the user. Stride length is measured using ultrasonic waves. The pedometer comprises an ultrasonic generator module which is strapped to one leg of the user. An ultrasonic detector module is strapped to the other leg of the user. The generator module emits pulses of ultrasonic energy which are detected by the detector module. A processor and display module in the form of a wristwatch is also provided. The processor module is used to calculate stride length based on the speed of sound and the time delay between pulses emitted and detected by the leg-mounted modules. The pedometer is capable of displaying on a digital display the distance traveled, time per unit distance, elapsed time and time of day. The pedometer is also programmed to compensate for a variety of measurement errors.

Title
Electronic pedometer
Application Number
6/211684
Publication Number
4371945
Application Date
December 1, 1980
Publication Date
February 1, 1983
Inventor
George R Boehme
Venice
CA, US
Gary L Wasserman
2669 Rambla Pacifico, Malibu, 90265
CA, US
Lawrence J Karr
220 Horizon St., Venice, 90291
CA, US
Agent
Reagin & King
Assignee
Gary Lee Wasserman
CA, US
Lawrence Joseph Karr
CA, US
IPC
G01C 22/00
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