Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7278806 | Two edge deburring tool A rotating tool for simultaneously deburring two surfaces of a workpiece is disclosed including a rotatable shaft having a first end and a second end with a first deburr surface on the first end facing towards the second end and having a first angle. A second deburr... | 10/09/2007 |
| 7090447 | Twist drill for drilling with a countersink cutting arrangement, and a cutting tool with a countersink cutting arrangement, and a cutting-chamfering tool A twist drill or drill/chamfer tool that comprises a drill with a shaft section. The shaft section is provided with a twisted flute and a clamping ring as the retainer of a facing cutter. The clamping ring tubularly encloses the shaft section or the drill shaft and ... | 08/15/2006 |
| 7014397 | Self-aligning handheld tapping tool A self-aligning tapping tool comprises an elongate handle having a longitudinal counterbore through a first end. A tap is received in the counterbore. A collar is operatively secured to the tap. The collar is slightly smaller than the counterbore to enable slidable ... | 03/21/2006 |
| 6840718 | Threaded hole finishing tool A finishing tool rides upward and downward on the surface of a tap. A spring urges the finishing tool toward an outer end of the tap. The finishing tool is guided along a helical flute on the surface of the tap. Cutting edges on the finishing tool are ground to debu... | 01/11/2005 |
| 6637989 | Center locating feature in drill bit formed without a pointed tip A centering feature (230) on a drill bit (110) configured without a pointed tip, formed as an opening (230) between first (206) and second (208) relatively angularly inclined portions of a work engaging end (116) of the drill bit (110). The first portion ... | 10/28/2003 |
| 5800148 | Blind-taper hole saw A rotary tool for forming a blind-tapered hole in a workpiece includes an elongate shaft having a bit shank on one end and a base plate secured to the other end. A collar, mounted for axial movement on the shaft, is biased away from the base plate to a fi... | 09/01/1998 |
| 5775853 | Machining method and multi-function tool An improved device and method for use in machining a workpiece, which includes a tool body with a machining tool having two machining surface, wherein one of the machining surfaces is being selectively movable between a retracted position and an extended ... | 07/07/1998 |
| 5203652 | Self-aligning tap and die wrench and universal threading tool A tap and die wrench for threading flat and round workpieces and, formed of hardened steel or a softer material with hardened steel inserts at those points sustaining torque and tensile forces during operation, provides a body member adapted for receiving... | 04/20/1993 |
| 4749315 | Tool for cutting a hole in a construction material precisely concentric to a reference aperture A tool is provided for drilling a hole in a construction material precisely concentric to a nearly inaccessible reference aperture situated opposite the side of the construction material from which the hole must be cut. A typical application is in cutting... | 06/07/1988 |
| 4555203 | Drilling machine A drilling machine including a spindle and an elevating hollow shaft rotatable in unison with the spindle. An annular cutter is mounted in axial alignment with the hollow shaft and an elevating center drill is mounted in axial alignment with the annular c... | 11/26/1985 |
| 4380990 | Portable core drill cutter for hard brittle sheets A portable lightweight drill assembly is mounted against one side of a sheet of flat glass having a hole or crack to be repaired; the drill shaft extends through the hole or crack to mount cutters on both sides; the cutters are spring biased against the g... | 04/26/1983 |
| 4208229 | System for repairing panes of glass A method for repairing panes of glass is provided which enables fractured panes to be strengthened and holes refilled while the pane remains installed in its support structure. The method comprises steps for relieving stress points in a fractured pane, an... | 06/17/1980 |
| 4090804 | Circular drill with centering device A circular cutting head assembly and centering drill of the type used, for example, in cutting holes in structural members such as I-beam webs, and flanges. The circular drill is characterized by a cylindrical body portion, supporting an inner centering d... | 05/23/1978 |
