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Expired Canadian patentCanada

Modulated laser source for optical storage

CA 1270293 C · Owner: Bjorklund, Gary Carl · Inventors: Bjorklund, Gary Carl

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract of the Disclosure, A time modulated source of frequency doubled laser radiation is described in which a non-linear crystal part of a stripline electrical circuit is mounted within a laser cavity so that the laser beam at a fundamental frequency impinges on and propagates through the non-linear crystal. A high bandwidth electrical data signal is coupled into the stripline electrical circuit to produce an electric field across the non-linear crystal so that an output beam is produced at a wavelength corresponding to the second harmonic of the fundamental frequency which represents a frequency doubled output beam modulated in accordance with the high bandwidth data signal. An …

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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 June 12, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 14, 1988
GrantedJune 12, 1990
Term endedJune 12, 2007
Patent numberCA 1270293 C
Classification (IPC)G02F1/37 +1 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedApril 14, 1988Patent grantedJune 12, 1990Term endedJune 12, 2007

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.