A chain shape lamp
CA 2277716 A1 · Owner: Chang, Chih-Chen · Inventors: Chang, Chih-Chen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a chain shape lamp comprising of several , chain, rings stringing together. Wherein the chain ring is a detachable hollow tube thereby , locate bulbs and wire the cord at inside. The chain shape lamp provided by the present, invention has a simple structure easy assembling, and convenience for , locating the bulbs and wiring the cord features, and meeting the necessary of large-scale production.
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 July 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2021.
- 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.