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Summary
| Description |
Patent 1179728 illustration - image for early three prong adapter, later classified as NEMA 10 |
|---|---|
| Source | |
| Date |
April 18, 1916 |
| Author |
P. G. Knapp |
| Permission ( Reusing this file) |
See below.
|
Licensing
 | This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. |
 |
 | This media file is either in the public domain or published under a free license, and contains no inbound file links. If this media file is useful, then it should be transferred to the Wikimedia Commons. If this media is not useful, then please propose it for deletion or list it at files for discussion. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:59, 18 November 2013 |
| 2,320 × 3,408 (80 KB) | Dovid ( talk | contribs) | Uploading a public-domain item using File Upload Wizard |
You cannot overwrite this file.
File usage
No pages on the English Wikipedia use this file (pages on other projects are not listed).
Metadata
Size of this preview:
408 × 599 pixels. Other resolutions:
163 × 240 pixels |
327 × 480 pixels |
523 × 768 pixels |
697 × 1,024 pixels |
2,320 × 3,408 pixels.
Original file (2,320 × 3,408 pixels, file size: 80 KB, MIME type: image/png)
Summary
| Description |
Patent 1179728 illustration - image for early three prong adapter, later classified as NEMA 10 |
|---|---|
| Source | |
| Date |
April 18, 1916 |
| Author |
P. G. Knapp |
| Permission ( Reusing this file) |
See below.
|
Licensing
| This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. |
|
| This media file is either in the public domain or published under a free license, and contains no inbound file links. If this media file is useful, then it should be transferred to the Wikimedia Commons. If this media is not useful, then please propose it for deletion or list it at files for discussion. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:59, 18 November 2013 |
| 2,320 × 3,408 (80 KB) | Dovid ( talk | contribs) | Uploading a public-domain item using File Upload Wizard |
You cannot overwrite this file.
File usage
No pages on the English Wikipedia use this file (pages on other projects are not listed).