Hitch control system
CA 2029009 C · Owner: Dharia, Vijay Manilal · Inventors: Dharia, Vijay Manilal; Easton, David Joseph; Boe, Thomas Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A hitch control system includes various sensors an operator, command lever, a spring-centered three position raise/lower switch, a control unit which generates control signals as a function thereof and an actuator which moves the hitch in response to the control signals. The control system permits the operator to move the hitch to a working position via manipulation of the command lever and a single manipulation of the raise/lower switch. The control system ignores switch manipulation unless the manipulation persists for at least a certain time period or, if the switch is manipulated in a different manner within a certain time of the earlier manipulation. In a …
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
- Filed October 30, 1990 and granted March 29, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2012.
- 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.