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| Patents for Arthur Jose Firth | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-1,190,810 | May 06, 1970 | A.J. Firth | Improvements in or Relating to Gear Systems Through Which a Shaft is Driven | engine lathes | |
| 3,765,259 | Oct. 16, 1973 | A.J. Firth | Forward and Reverse Drive Mechanism for a Machine Tool | metalworking power transmission | |
| 3,788,158 | Jan. 29, 1974 | A.J. Firth | Trip Device for Use in a Feed Mechanism of a Machine | metalworking machine mechanisms | |