Electronic level device
CA 1237181 A · Owner: Dilcox, Warren L. · Inventors: Dilcox, Warren L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electronic level device characterized by an enclosure a knob and shaft rotatably coupled to the enclosure and a, mercury switch located within the enclosure and attached to an end portion of the shaft. The mercury switch is closed when it is in a gravitationally normal position and is open when it is, tilted from the gravitational norm by more than a predetermined amount. By rotating the knob, the angle at which the mercury switch closes can be varied. An audible alarm is actuated by the closure of the mercury switch.
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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.