Apparatus for locating and detecting pain
CA 1254269 A · Owner: Woodley, William E. · Inventors: Longmire, David R.; Woodley, William E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A selective tissue conductance meter is described which can be used to assess pain, abnormal sensation or sympathetic disfunction in a human being or animal. Two concentric electrodes are mounted in fixed relative relationship on a housing which is capable of being held in one hand of the user. Contained in the housing is an electric circuit connected to the two electrodes which circuit produces, an electrical signal having a pulse frequency that varies according to the measured conductance. A battery capable of providing low voltage power is connected to the circuit. Several devices are disclosed for monitoring or measuring the electrical signal to permit the user to detect the pulse …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 16, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 16, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.