| Patents for Harold Fletcher Massey |
Patents 16 -
25
of 25
      |
| Number | Date | Patentee | Title | Type |
| GB-191,017,693 | May 11, 1911 | H. Clayton, H.F. Massey | Improvements in valves and valve-gear for steam-hammers and the like | drop hammers |
| GB-188,069 | Nov. 02, 1922 | H.F. Massey | Improvements in pneumatic power hammers | |
| 1,524,195 | Jan. 27, 1925 | H.F. Massey | Pneumatic power hammer | power hammers |
| GB-370,382 | Apr. 04, 1932 | L.W. Wells, H.F. Massey | Improvements in automatic friction drop stamps | drop hammers |
| GB-377,217 | Jul. 20, 1932 | H.F. Massey | Improvements in hammers with cranks for transmitting motion to the tups | power hammers |
| GB-402,435 | Dec. 04, 1933 | L.W. Wells, H.F. Massey | Improvements in pneumatic power hammers | drop hammers |
| GB-424,591 | Feb. 25, 1935 | H.F. Massey | Improvements in presses and pressing mechanism | lever presses |
| GB-497,826 | Dec. 28, 1938 | H.F. Massey | Improvements in or relating to stamps, hammers and the like | drop hammers |
| GB-520,833 | May 06, 1940 | H.F. Massey | Improvements in or relating to stamps, hammers and the like | drop hammers |
| GB-551,301 | Feb. 16, 1943 | H.F. Massey | Improvements in or relating to power stamps, hammers, and like machines | drop hammers |
