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| All Patents in class 48/87 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 809,261 | Jan. 02, 1906 | F.G. Hobart | Valve for Gas Producers | ||
| 879,441 | Feb. 18, 1908 | R.B. Cissel | Gas-Producer | ||
 | 1,698,525 | Jan. 08, 1929 | A.J. Bassett | Oil Gas Apparatus | |