Coilable tape measures
CA 1114600 A · Owner: Rabone Chesterman Limited · Inventors: Boyllin, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coilable tape measure comprising a casing a, coilable tape and a recoil spring having its outer end connected to the inner end of the tape the spring being, mounted on a fixed inner spool and the tape being mounted on a rotatable outer spool and the inner spool being prevented from rotating by pegs in the casing engaging holes in the inner spool.
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 December 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 1998.
- 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.