File:Norton mechanical filter detail.png
Norton_mechanical_filter_detail.png (435 × 440 pixels, file size: 22 KB, MIME type: image/png)
| Description |
A mechanical filter designed using electrical network theory |
|---|---|
| Source |
US patent US1792655 |
| Date |
31st May 1929 (filed) |
| Author |
Edward Lawry Norton cropped and refactored for better aspect ratio by SpinningSpark |
| Permission (Reusing this file) |
See below. |
| Other versions | File:Norton mechanical filter.png |
Licensing[edit]
 | In general, the contents of United States patents are in the public domain in the US.[1] 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: [2][3][4](archived) 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. |
 | The uploader or another editor requests that a local copy of this file be kept. This image or media file may be available on the Wikimedia Commons as File:Norton mechanical filter detail.png. While the license of this file may be compliant with the Wikimedia Commons, an editor has requested that the local copy be kept too. This file does not meet CSD F8 and should not be tagged as a Commons duplicate. If you desire to nominate it for deletion, notify the tagging editor. |  |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:45, 24 November 2009 | | 435 × 440 (22 KB) | Spinningspark (talk | contribs) | {{Information |Description=A mechanical filter designed using electrical network theory |Source=US patent US1792655 |Date=31st May 1929 (filed) |Author=Edward Lawry Norton cropped and refactored for better aspect ratio by ~~~ |other_versions=[[Norton |
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