Hidden wire pole
CA 1114347 A · Owner: International Paper Company · Inventors: Hujanen, Duane R.; Osterman, Walter O.; Hunter, Roy W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Splines which are partially inserted into longitudinal grooves in wood members, such as, outdoor light poles are dis-, closed. Conduit (e.g. electrical wires or piping) is recessed in the groove and is protected by the spline. The spline is attached to the member on only one side of the groove so that it moves with that side of the groove as the groove expands and contracts. The outer face of the spline is wider than the mouth of the groove and lies flush against the periphery of the member. Thus, even when the groove expands the spline's, outer face covers the groove and protects the wires.
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 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 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.