Battery tachometer
CA 1320357 C · Owner: Puetz, Peter A. · Inventors: Marino, Joseph A.; Puetz, Peter A.; Makhija, Surender K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A signal representing the RPM of an internal combustion engine (18) is produced by a signal processor (10) connected to the battery (14) of the vehicle (22). The signal processor (10) derives an electrical signal from the battery (14) which contains signal components produced by operation of the vehicle ignition system (16), as well as components from a multitude of other sources (20) such as the voltage regulator, fans, air conditioning and other electrical systems of the vehicle (22). The signal processor (10) filters and signal processes the signal derived from the vehicle battery (14) to produce a signal having a frequency which is related to the RPM of the engine (18).
Read the whole patent
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 July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2010.
- 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.