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| Patents for Frederick William Portass | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-103,933 | Feb. 15, 1917 | F.W. Portass | Improvements in or Relating to Chasing Bar Lathes | metal lathes | |
| GB-179,048 | May 04, 1922 | F.W. Portass | An Improved Stand for Lathes, Small Machines and the like | metal lathe accessories and attachments | |
| GB-208,348 | Dec. 20, 1923 | F.W. Portass | Improvements Relating to Compound Rests and the like for Lathes and Machine Tools | metal lathe accessories and attachments | |