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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7267513 | Spade drill bit A spade drill bit (202) comprises a shaft (204) having one end (205) configured to be engaged to a driving tool and a cutting head (206) attached at an opposite end of said shaft (204). The cutting head (206) includes a cent... | 09/11/2007 |
| 7264427 | Drill bit apparatus A drill bit apparatus having a central shaft and an annular collar mounted thereon. The central shaft is coaxially positioned within the annular collar. The central shaft has a bit end and a cutting tool end. The annular collar is spaced between the bit and cutting ... | 09/04/2007 |
| 7140814 | Spade-type drill bit having helical configuration A spade bit including a longitudinally extending shaft having a cutting member located at a distal end thereof. The cutting member comprises a pair of helically shaped, opposed blades joined along the longitudinal axis of the shaft and an axially extending pilot spu... | 11/28/2006 |
| 5979912 | Heavy-metal shrink fit cutting tool mount A mount for interfacing a cutting tool having a generally cylindrical shank portion to a tool holder having a central opening. The mount comprises an elongate, generally cylindrical shank member having first and second ends. The first end is insertable in... | 11/09/1999 |
| 5291806 | Spade-type drill bit apparatus and method A spade-type drill bit is disclosed having a shank portion and a spade bit portion extending from the shank portion. The spade bit portion includes a spade portion with a planar region, and a center tip concentric with a longitudinal axis and extending fr... | 03/08/1994 |
| 5244319 | Auger bit A boring bit for boring holes in one or more workpieces such as wood and the like. An axially elongated shank portion of the boring bit has a tool engaging portion at one end and a head portion on a second end. A central axis longitudinally extends throug... | 09/14/1993 |
| 4773354 | Apparatus for uniformly dispensing a paste material An apparatus for dispensing high viscosity paste materials onto a seal edge includes a conditioning chamber which permits the build up of a back pressure to aid the exit of the paste from the outlet orifice of the chamber. An auger which dispenses the pas... | 09/27/1988 |
| 4091693 | Helical surface-shaped machine part and method for manufacturing the same A helical surface-shaped machine part or component having a radially extended flank profile or section. At least two components wound in the same direction are joined together by means of their contacting coils in such a manner that their cross-sections a... | 05/30/1978 |
| 4012970 | Method of forming a wood boring tool A boring tool for woodworking, and more particularly, a method of manufacturing the cutter head from a blank of cylindrical tool steel bar stock. The opposite ends of the cylindrical blank are turned to the desired radius for the cutter head, a transverse... | 03/22/1977 |
