File:Pierce cross-coupled filter.png
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Summary
| Description |
English: Cross-coupled filter in waveguide, described by the inventor as "paralleled resonator transducers". |
| Date | 4th May 1948 (filed) |
| Source | Transferred from en.wikipedia to Commons. |
| Author | John R. Pierce |
| Permission (Reusing this file) |
PD-US-PATENT-NO NOTICE. |
Licensing
|
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}}. |
Original upload log
The original description page was here. All following user names refer to en.wikipedia.
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 2013-04-22 17:08 | 939×572× (229683 bytes) | Spinningspark | {{Information |Description=Cross-coupled filter in waveguide, described by the inventor as "paralleled resonator transducers". |Source=US patent US2626990 |Date=4th May 1948 (filed) |Author=[[John R. Pierce]] |other_versions= }} == Licensing == {{PD-U... |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:32, 25 October 2014 | | 939 × 572 (224 KB) | Wdwd | == {{int:filedesc}} == {{Information |Description={{en|Cross-coupled filter in waveguide, described by the inventor as "paralleled resonator transducers".}} |Source=Transferred from [http://en.wikipedia.org en.wikipedia] |Date=4th May 1948 (filed)<br/>... |
File usage
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Global file usage
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- Usage on es.wikipedia.org
