Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7293588 | Woodworking tools A rotary shaper tool for use in conjunction with a power tool used to rotate the shaper tool in which a cutter panel is formed about a cylindrical framework. The cutter panel is formed with rows or sets of cutter teeth and an array of vent holes. Chips formed by the... | 11/13/2007 |
| 7007393 | Microreplicated shaving element In a microreplicated shaving element the substrate includes a plurality of microshaving elements projecting outwardly from a surface defined by the substrate. Each microshaving element defines a cutting edge spaced away from the surface and a plurality of guard elem... | 03/07/2006 |
| 4936055 | Spring file A spring file comprises a coiled spring, the outer flattened periphery of which is coated with abrasive particles so as to form a file face and the method of manufacturing the same. In a first arrangement of the spring file, the coiled spring has the file... | 06/26/1990 |
| 4811632 | Method of producing an acetabular reamer cup A method for making an acetabular reamer cup and an acetabular reamer cup made thereby. The method comprises the steps of fabricating a bowl-shaped cup-blank having an outer surface, an inner surface and a rim, perforating a plurality of holes through the... | 03/14/1989 |
| 4611508 | Endodontic instrument An improved endodontic instrument includes a tapered working portion defined on a flexible shaft. The working portion includes a plurality of spiral rotationally bi-directional cutting edges thereon. The instrument includes a tapered tip defined on the fl... | 09/16/1986 |
| 4611509 | Method of manufacturing a dental root canal cutting tool and apparatus therefor A dental root canal cutting tool is formed by mounting a wire rod (3) onto a chuck-head (5). The chuck-head (5) variably rotates and advances the wire rod (3) into a guide (6) having a guide hole (7). A whetstone (9) is disposed proximate the outlet of th... | 09/16/1986 |
| 4219915 | Abrading tool blades and method of making same An elongate substantially rectangular abrading tool blade, which can be used either for smoothing or for heavy stock removal, is formed of sheet metal and has a multiplicity of ground and hardened cutting teeth distributed over a cutting face of the blade... | 09/02/1980 |
| 4182204 | Method for making file teeth A method for making file teeth including a punch and anvil that forms part of a die set. A strip of metal is positioned on the die set so that by moving the punch into engagement with the strip of metal, a plurality of file teeth will be formed from the s... | 01/08/1980 |
| 4155149 | File and method for making same A file comprises a handle and a tool connected to the handle. The tool comprises a body and a sleeve encompassing the body. The sleeve is formed of grinding material and includes an exterior grinding surface. Portions of the sleeve are disposed in recesse... | 05/22/1979 |
| 3951012 | Process for making a file and article resulting therefrom A process for making a file wherein the formation of the file teeth by striking a blank with a chisel-like bit also forms sharp serrations on the back sides of the teeth adjacent the cutting edge, with the improvement of preserving such serrations without... | 04/20/1976 |
| 3935756 | Method for manufacturing a file from a thin-walled tube A file of non-circular cross section is formed from a multiple helical pattern of teeth and then reshaping the tube internally using a shaping mandrel.... | 02/03/1976 |
