English: Perspective and enlarged sectional patent drawings of an unreleased Gillette razor, known in-development as Contra and later as Atra (acronym for Australian Test Razor; not to be confused with the 1977 twin-blade, swiveling-head razor known as Atra in the U.S. and Contour in Europe). The patent describes the razor as a "bi-directional shaving system in which shaving may be effected with a stroke in either of two opposite directions."
The razor was ready and planned to be launched in 1971, but was abandoned last-minute in favor of the Trac II, which retained the familiar method of shaving in one direction.
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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