| Patents for Howard P. Denison |
Patents 1 -
15
of 18
      |
| Number | Date | Patentee | Title | Type |
| 389,291 | Sep. 11, 1888 | A. Dey | Razor-sharpening machine | sharpening apparatus |
| 468,093 | Feb. 02, 1892 | J. Carr | Surface Gauge | surface gauges |
| 483,785 | Oct. 04, 1892 | G.S. Hilts | Pipe Wrench | chain and strap wrenches |
| 488,600 | Dec. 27, 1892 | J.J. Cowell | Vise | vises |
| 490,121 | Jan. 17, 1893 | H.J. Leighton | Protractor Bevel | bevels |
| 510,441 | Dec. 12, 1893 | W.L. Pike | Improvements in Vehicle Wrenches | axle nut wrenches |
| 519,703 | May 15, 1894 | O.C. Ekman | Surface Gage | surface gauges |
| 534,470 | Feb. 19, 1895 | G.H. Fowler | Harvester-knife grinder | sharpeners |
| 546,094 | Sep. 10, 1895 | F.F. Ellis | Micrometer Calipers | micrometers |
| 565,002 | Aug. 04, 1896 | A.B. Ireland | Clutch | sawmills |
| 613,626 | Nov. 01, 1898 | J.F. Gilliland | Box-assembling machine | box making machines |
| 710,807 | Oct. 07, 1902 | R.M. Russell | Grinding attachment for lathes | metal lathe accessories and attachments |
| 710,808 | Oct. 07, 1902 | R.M. Russell | Grinding attachment for lathes | metal lathe accessories and attachments |
| 790,479 | May 23, 1905 | W. Carr, J. Carr | Boring-tool holder | lathe tool holders and tool posts |
| 820,935 | May 15, 1906 | H.A. Moyer | Type-writing machine | |
