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<!== Summary ==

Description
English:
English: Patent Drawing for Spiralift Actuator, U.S. Patent 4,875,660 (1989), with content shifted and legend added.
Date Filed Feb. 6, 1989
Source US Patent n° 4,875,660
Author Pierre Gagnon
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Public domain The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)

The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.

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current04:57, 5 August 2010Thumbnail for version as of 04:57, 5 August 20101,656 × 1,662 (494 KB)Catsquisher<!== {{int:filedesc}} == {{Information |Description={{en|1=Patent Drawing for Spiralift Actuator, U.S. Patent 4,875,660 (1989), with content shifted and legend added.}} |Source=[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&

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