US Patent: 510,068
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| Gas Coffee Roaster
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Patentee:
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| Karel F. Henneman (exact or similar names) - The Hague, South Holland Province Netherlands |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 26, 1893 |
| Granted: |
Dec. 05, 1893 |
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Joel Havens
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Description: |
| Patented in Spain, 23 Aug., 1888, patent #9,700;in Belgium, 27 May, 1889, patent #86,399: in France, 29 May, 1889, patent #198,600; in England, 07 Jun., 1889, patent #9,499; in Germany, 13 Jun., 1889, patent #53,885; in Austria-Hungary, 07 Apr., 1890, patent #49,006 & 8,873 and in Switzerland, 21 Mar., 1891, patent #3,417. |
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