Hairpiece construction
CA 1231023 A · Owner: West Coast Hair Products, Inc. · Inventors: Chao, Chen K.; Palumbo, Albert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved hairpiece foundation means comprising: a, sheetlike fibrous woven fabric base having spaces between adjacent fibers; and a further fibrous sheetlike woven fabric member having air spaces between adjacent fibers sonically welded to the base along a plurality of mutually spaced lines. The hairpiece of the invention provides a continuous breathing relationship for the head of the wearer of the hairpiece as well as reducing the contact of adhesive used to secure the hairpiece to the head of the user with the hairs composing the hairpiece and thereby obviating a source of damage to the hairpiece.
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 January 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 5, 2005.
- 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.