2165723-A is referenced by 10 patents and cites 6 patents.

An animal identification device comprising a transponder in the form of a unique electronically coded bolus which fits inside the animals reticulum. A hand held interrogator allows the operator to identify the animals unique number, remotely. To do this, the operator uses his 'password' as verification to allow access followed by which he presses a button which allows him/her to activate the electronically coded bolus, and obtain the animals number. The transmitter system used in the bolus comprises an antenna, oscillator, timer, modulator/tripler and encoder. All the components of the transponder are encased in a cylindrical tube of hard, clear plastics material.

Animal identification system
Application Number
GB19840026150 19841016
Publication Number
2165723 (A)
Application Date
October 16, 1984
Publication Date
April 16, 1986
Nixon Alexander Francis
Nixon Alexander Francis
H04B 01/59
G07C 09/00
A01K 11/00
G07C 09/00
A01K 11/00
View Original Source Download PDF