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| All Patents in class 48/4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 656,874 | Aug. 28, 1900 | F.E. Baldwin | Acetylene-gas lamp | acetylene gas lamps | |
| 705,115 | Jul. 22, 1902 | J.A. Mosher | Acetylene Gas Generator | acetylene gas generators | |
| 829,669 | Aug. 28, 1906 | G.G. Porter | Device for governing the flow of fluids | ||