File:HartnessComparator.jpg
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Summary
| Description |
English: Patent drawings (edited for simplicity) of optical comparator invented by James Hartness and Russell Porter |
| Date | |
| Source | Patent #1,703,933 |
| Author | Hartness, James and Porter, Russell |
| Permission (Reusing this file) |
U.S. Patent (expired) |
| Location | U.S. Patent Office |
Licensing
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In general, the contents of United States patents are in the public domain.
In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):
The original patent should be checked for the presence of such language before an assumption is made that the contents are in the public domain. (This template can be replaced by ((PD-US-patent-no notice)) in such cases.)
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Original upload log
Transferred from en.wikipedia to Commons using For the Common Good.
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 01:27, 13 April 2008 | 1,079 × 658 (253,857 bytes) | w:en:HopsonRoad (talk | contribs) | ((Information |Description=Patent drawings of optical comparator invented by James Hartness and Russell Porter |Source=Patent #1,703,933 |Date=March 5, 1929 |Location=U.S. Patent Office |Author=Hartness, James and Porter, Russell |Permission=Work of U.S. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:58, 10 April 2020 | | 1,079 × 658 (248 KB) | Hippymoose17 | Transferred from en.wikipedia: see original upload log above |
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