Orthodontic spring force adjustment
CA 1160483 A · Owner: Northwest Orthodontics, Inc. · Inventors: Armstrong, Maclay M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Applicant: Maclay M. Armstrong, Title: Orthodontic Spring Force Adjustment ABSTRACT, An extraoral force-reaction device engageable with the wearer's head and/or neck, such as a headcap or a neckband, is connected to an intraoral forceapplying device, such as molar bands, by helical spring force-producing means. The force to be exerted by the spring force-producing means can be readily adjustable in predetermined increments, such as by engaging a spring end hook selectively with any anchor post of several posts arranged in a row lengthwise of the spring.
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 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2001.
- 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.