Multiple channel video camera programming and control system
CA 2000598 A1 · Owner: Lectrolarm Custom Systems, Inc. · Inventors: Smith, William V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatic multiple channel programming and video camera control system is disclosed in which, while the camera operator is operating the video camera system, the control signals generated by the operator are converted to a unique plurality of signals for recordation on a mass storage media, such a video tape recorder. By the use of two or more dual tone multi-frequency circuits having different crystal oscillator frequencies in both the programming and decoder circuits, and causing the DTMF circuits in the programming circuit to provide their outputs as 1/20th of a second alternating pulses, multiple channels of control are generated for recordation on a mass storage medium, for example …
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 12, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2011.
- 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.