Interactive check list
CA 1319965 C · Owner: Greenway, Peter R. · Inventors: Greenway, Peter R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an interactive check list. A list of items is provided, each item of which is associated with a signal key and a lamp. The device may be battery powered. In checking the list the user presses a key associated with an item and the associated lamp, preferably an LED changes, its condition. Usually all the LEDs are lit at the beginning of an operation and go out as the items are checked off. The items may be checked off in any order. Suitable circuitry is provided between each signal and its associated, lamp such as a NOR latch. Reset means may be provided and, optionally, a counter for run-throughs of the device and display means for the count. In some embodiments …
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 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 6, 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.