| Patents for L. Douville |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 297,640 | Apr. 29, 1884 | F. Schmemann | Wrench | pipe wrenches |
| 385,414 | Jul. 03, 1888 | G.W. Huber | Brace for screw-drivers, bits, etc. | spiral screwdrivers |
| 443,312 | Dec. 23, 1890 | P.J. Bode | Pipe Tongs | pipe wrenches |
| 466,986 | Jan. 12, 1892 | G.C. Van Roden | Calipers for Bracelets | calipers |
| 470,889 | Mar. 15, 1892 | J.H. Fredericks | Hammer | hammer handles |
| 526,658 | Sep. 25, 1894 | H. Polis | Wrench and Bit Stock | brace wrenches |
| 626,285 | Jun. 06, 1899 | A. Metzger | Wrench Attachment for Combination Tools | combination tools |
| 902,570 | Nov. 03, 1908 | W.P. Ellis | Stretching Pincers | pliers |
| 1,054,700 | Mar. 04, 1913 | W.H. Lutz | Compression Wrench | chain and strap wrenches |
| 1,081,684 | Dec. 16, 1913 | W.H. Lutz | Compression Wrench | chain and strap wrenches |
| 1,127,100 | Feb. 02, 1915 | M.M. Shuster | Wrench | screw adjust wrenches |
