| Patents for Frank Pearn & Co., Ltd. |
Patents 16 -
30
of 43
      |
| Number | Date | Patentee | Title | Type |
| GB-178,569 | Apr. 20, 1922 | W.A. Pearn | Improvements in drilling machines | drill presses |
| GB-185,004 | Aug. 31, 1922 | W.A. Pearn | Improved method of locking indexed work tables of machine tools | metalworking machines |
| GB-189,352 | Nov. 30, 1922 | W.A. Pearn | Improvements in jigs for facilitating drilling operations | drilling and boring |
| GB-204,589 | Oct. 04, 1923 | H.W. Pearn | Improvements in variable speed and reversing gearing | metalworking machine gearing |
| 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 |
| CA-239,508 | Apr. 22, 1924 | H.W. Pearn | Variable speed and reversing gearing | metalworking machine gearing |
| GB-220,904 | Aug. 28, 1924 | W.A. Pearn | Improvements relating to boring, facing and like machines | horizontal boring mills |
| GB-221,074 | Sep. 04, 1924 | H.W. Pearn | Improvements relating to direct acting pumps and compressors | pumps |
| GB-221,351 | Sep. 11, 1924 | H.W. Pearn | Improvements in apparatus for raising liquids | pumps |
| GB-237,679 | Aug. 06, 1925 | W.A. Pearn | Improvements relating to grinding and like machines or attachments | horizontal boring mills |
| GB-249,682 | Apr. 01, 1926 | H.W. Pearn | Improvements relating to speed reduction gearing | metalworking machine gearing |
| GB-256,811 | Aug. 19, 1926 | B. Stephenson | Improvements relating to feed water heaters | stationary boilers |
| GB-258,113 | Sep. 16, 1926 | H.W. Pearn | Improvements in variable speed gearing | metalworking machine gearing |
