| All Patents in class 451/344 |
Patents 1 -
15
of 38
      |
| Number | Date | Patentee | Title | Type |
| 220,290 | Oct. 07, 1879 | J.M. Hunter | Improvement in stocks for grinding and drilling tools | eggbeater drills |
| 791,301 | May 30, 1905 | F. Stahl | Saw-gumming machine | saw gummers |
| 809,822 | Jan. 09, 1906 | C.H. Lawton | Holder for Rotary Tool Operating Machines | tool holders |
| 900,149 | Oct. 06, 1908 | C.W. Danglemeyer | Portable Milling Machine | portable milling machines |
| 972,446 | Oct. 11, 1910 | G.F. Hall | Floor dressing machine | |
| 1,090,602 | Mar. 17, 1914 | E.I. Dodds | Power-operated hand planer or smoother | handheld power planers |
| 1,209,594 | Dec. 19, 1916 | A.H. Kling | Axle Truing Device | axle cutters and threaders |
| 1,210,145 | Dec. 26, 1916 | L.V. Calhoun | Folding grindstone-frame | grindstone frames |
| 1,223,359 | Apr. 24, 1917 | J.O. Berg | Tool for treating stone, concrete and other materials | handheld power tools |
| 1,229,401 | Jun. 12, 1917 | S.D. Black, A.G. Decker | Drill gearing | handheld power tools |
| 1,241,659 | Oct. 02, 1917 | E. Ritz, Jr. | Electric portable grinder | handheld grinders |
| 1,259,132 | Mar. 12, 1918 | E. Ritz, Jr. | Portable electric tool | handheld grinders |
| 1,281,988 | Oct. 15, 1918 | E. Madison | Sawing Machine | handheld circular saws |
| 1,352,581 | Sep. 14, 1920 | A.A. Clarke | Handle attachment for surface-treating machines | |
| 1,475,153 | Nov. 20, 1923 | H. Athenas | Portable electric combination drill | handheld power drills |
