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| Patents for Roswell Plummer | |||||
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| Number | Title | Classification(s) | |||
| 3,597 | Manner of Constructing an Inflammable Gas or Vapor Engine | 123/190.4, 123/39, 123/41.67, 123/41R, 123/557, 123/61R, 123/65R, 123/70R | |||