| All Patents in class 81/439 |
Patents 16 -
27
of 27
      |
| Number | Date | Patentee | Title | Type |
| 2,596,594 | May 13, 1952 | J.N. Petre | Chuck Feature of Tools of the Detachably Connected Shank and Handle Type | screwdriver mechanisms |
| 4,644,831 | Feb. 24, 1987 | M. Yang | Adaptor Sleeve | tool holders |
| 5,343,786 | Sep. 06, 1994 | G.A. Wridt | Bit and Socket Combination | socket wrenches |
| 5,425,289 | Jun. 20, 1995 | D.J. Iwinski | Bung Tool | |
| 5,533,429 | Jul. 09, 1996 | B. Kozak | Fastener Driving Tool Insert | screwdriver mechanisms |
| 5,577,426 | Nov. 26, 1996 | F. Mikic, D.M. Eggert | Magnetic Bit Holder and Hand Tool Incorporating Same | screwdrivers |
| 5,651,647 | Jul. 29, 1997 | J.R. Bennie | Auxiliary chuck and screwdriver for electric drills | handheld power tool accessories |
| 5,713,252 | Feb. 03, 1998 | M.J. Hasenberg, D.J. Iwinski | Ergonomic Multi-Tool Handle | tool handles |
| 5,819,612 | Oct. 13, 1998 | W. Anderson | Multiple Bit Storing Hand Tool Having Minimized Bulk Volume and High Storage Capacity | screwdriver mechanisms |
| 5,868,048 | Feb. 09, 1999 | W. Anderson, P. Cassutti | Adjustment Hand Tool/Screwdriver | screwdriver mechanisms |
| 5,904,080 | May 18, 1999 | P. Cassutti, W. Anderson | 8 in 1 Tool Bit Driver Hand Tool | screwdriver mechanisms |
| 6,286,400 | Sep. 11, 2001 | P. Cassutti, W. Anderson | Electrical Installer Putty-Filled Screw Hole Clearing 10-in-1 Driving Tool | screwdriver mechanisms |
