Luminescent solid state status indicator
CA 1046943 A · Owner: Monsanto Company · Inventors: Keune, David L.; Craford, Magnus G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
LUMINESCENT SOLID STATE STATUS INDICATOR ABSTRACT OF THE DISCLOSURE:, A luminescent solid state status indicator including at least first and second light emitting diodes of different colors which may be mounted on a single header, One side of each of the diodes is connected in common to one side of a source of energizing voltage subject to variation in magnitude. The other sides of the diodes are interconnected with the electrodes of a transistor which has one electrode connected to the other side of the DC energizing voltage. The transistor is adapted selectively to energize the first and second light emitting diodes to display colors corresponding respectively to discrete magnitudes of …
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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 January 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 1996.
- 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.