This logo was used by Southwest Technical Products Corporation of San Antonio, Texas from around 1971 to 1985. It was never registered with the United States Patent and Trademark Office and never appeared with a TM symbol.
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Source
The logo was published by Southwest Technical Products in over twenty company catalogs and hundreds of other documents starting in 1971 that did not have a copyright notice. [1] The privately held company ceased all operations around 1990. This particular SWTPc logo image was created from a scan of an actual SWTPc product logo which was then pixel edited for sharpness and clarity by Bill Dawson. See http://www.swtpc.com for the GIF source for this PNG image.
Author
Southwest Technical Products Corporation of San Antonio, Texas
Other versions
File:SWTPC logo.svg is a vector version of this file. It should be used in place of this PNG file when not inferior.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
From source website: "I want this information to be available to all and you can make copies of any of the files. You can not sell the files. Copyright 2000-2003, Michael Holley."
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