Manhole cover support having interbraced top members
CA 1309890 C · Owner: Bowman, Harold M. · Inventors: Bowman, Harold M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved manhole cover support having a metal body comprising base, seat, and keeper portions the, keeper portion rising above the seat portion and having at least a pair of opposing ends that define a gap between them, a bridging piece for spanning each said gap, the bridging piece having at least one free end a, receiver for slidably retaining each free end of each bridging piece, the receiver attached to and protruding outwardly from the keeper portion near the top thereof the bridging piece including means for exerting parting pressure against the receivers that retain it.
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 November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.