| Patents for William Alfred Pearn |
Patents 16 -
21
of 21
      |
| Number | Date | Patentee | Title | Type |
| GB-189,352 | Nov. 30, 1922 | W.A. Pearn | Improvements in jigs for facilitating drilling operations | drilling and boring |
| GB-212,965 | Mar. 17, 1924 | W.A. Pearn | Improvements relating to boring, facing and like machines | horizontal boring mills |
| GB-213,952 | Apr. 15, 1924 | W.A. Pearn | Improvements relating to boring, facing and like machines | horizontal boring mills |
| GB-214,329 | Apr. 22, 1924 | W.A. Pearn | Improvements relating to boring, facing and like machines | horizontal boring mills |
| GB-220,904 | Aug. 28, 1924 | W.A. Pearn | Improvements relating to boring, facing and like machines | horizontal boring mills |
| GB-237,679 | Aug. 06, 1925 | W.A. Pearn | Improvements relating to grinding and like machines or attachments | horizontal boring mills |
