Distance compensating deflected light beam pattern projector
CA 1138190 A · Owner: Nordgren, Bo G. · Inventors: Biedermann, Klaus; Dkerlind, Bo; Nordgren, Bo G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method in rock blasting operations for marking out drill holes when drifting tunnels while making use of a direction reference beam which is projected in a direction in accordance with a predetermined lay out at, least part of said reference beam being passed to a scanning means by means of which said part-beam in accordance with a predetermined drill hole pattern is directed onto the rock to present thereon images of the beam at locations of intended drill holes on the rock surface. Correspondingly, a device for executing said method comprises means for deflecting at least part of a reference light beam onto locations for holes to be drilled in accordance with a predetermined pattern …
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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 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 1999.
- 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.