File:Cambell filter.png
Cambell_filter.png (724 × 178 pixels, file size: 8 KB, MIME type: image/png)
Captions
Summary
[edit]DescriptionCambell filter.png |
English: Campbell's original sketch of his wave filter. Some annotation removed for clarity. |
Date | filed 15 July 1915, issued 22 May 1917 |
Source | , Electric wave-filter, US patent 1 227 113 |
Author | George A, Campbell (edited by SpinningSpark) |
Licensing
[edit]Public domainPublic domainfalsefalse |
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.) |
Original upload log
[edit]Transferred from en.wikipedia to Commons by Sreejithk2000 using CommonsHelper.
- 2009-07-26 15:20 Spinningspark 724×178× (8307 bytes) {{Information |Description=Campbell's original sketch of his wave filter. Some annotation removed for clarity. |Source=, ''Electric wave-filter'', US patent 1 227 113 |Date=filed 15 July 1915, issued 22 May 1917 |Author=George A, Campbell (edited by ~~~)
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current | 06:38, 2 June 2010 | 724 × 178 (8 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Campbell's original sketch of his wave filter. Some annotation removed for clarity.}} |Source=Transfer |
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