| All Patents in class 200/522 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 1,702,245 | Feb. 19, 1929 | S.D. Black, A.G. Decker | Electrical connection for portable electric tools | handheld power tools |
| 1,762,202 | Jun. 10, 1930 | B.W. Sweet | Self-opening-switch lock | |
| 2,711,461 | Jun. 21, 1955 | R. Happe | Portable electric tool handle assemblies | handheld power drills |
| 3,072,768 | Jan. 08, 1963 | R. Happe, J.P. Yelpo | Built-in switch for insulated portable electric tools | handheld power tools |
| 3,413,498 | Nov. 26, 1968 | L.H. Bowen, III, C.R. Stelljes | Electrically powered hand tool | handheld power tools |
