File:US Patent 774250.png
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Image from U.S. Patent 774,250, the first electrical power plug
- SEPARABLE ATTACHMENT-PLUG
- Inventor: HARVEY HUBBELL
- Patent number: 774250
- Filing date: Feb 26, 1903
- Issue date: Nov 8, 1904
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current | 23:00, 23 May 2005 | 1,660 × 1,018 (66 KB) | Duk (talk | contribs) | Image from US Patent #774,250, the first electrical power plug {{patent}} |
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