Automatic multi-probe pwb tester
CA 2174784 C · Owner: Zhong, George Guozhen · Inventors: Zhong, George Guozhen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new structure of a test apparatus (tester) for detecting shorts and opens of a printed wiring board and an associated automatic test method. The tester has means for injecting signals into conductors of a printed wiring board under test (BUT) and a large number of integrated solenoid-actuated probes which are arranged in a two-dimensional array for sampling signals from the conductors of the BUT. The signals are sampled from the conductors by the integrated solenoid-actuated probes in a row by row scanning sequence following a grid pattern of the BUT. Each of the probes needs only to sample signals from the conductors in a small portion of the BUT.
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 April 23, 1996 and granted July 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2018.
- 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.