Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 5461768 | Electrically heatable caulking system and method An electrical caulking method for a work made from a magnesium or a magnesium alloy wherein a caulking pin integrally projects from a body, wherein an electric caulking apparatus having two opposing electrodes is used. The work is held between the opposin... | 10/31/1995 |
| 5054301 | Method of forming metallic product A metallic product is formed by an electric upsetter having anvil and clamp electrodes. The anvil electrode is made of a material having a relatively small thermal conductivity. A rod-shaped blank of a metallic material is placed between the anvil and cla... | 10/08/1991 |
| 4924054 | Electrical resistance brazing device Apparatus for heating a tube/sleeve end fitting for brazing comprises an opposed pair of electrodes having arcuate electrode surfaces contoured for external peripheral engagement with a tube/sleeve end fitting, with one part of the electrode surface in en... | 05/08/1990 |
| 4404458 | Attachment of fork fitting to fork leg A method for attaching a bicycle fork fitting to a fork leg is disclosed, using a particular fork fitting means. A steel pipe is formed with a fork leg including its one closed distal end with a joint. The fitting means is provided with projections at the... | 09/13/1983 |
| 4099043 | Progressive die welding of electrical contacts Electrodes are incorporated in a progressive die to weld precious metal to spring contact body being formed by the die. One electrode is carried by the die bolster and the other electrode is carried by a pivotally mounted narrow arm projecting into the di... | 07/04/1978 |
| 4015098 | Apparatus for making intercell connectors by an extrusion-fusion technique Improved extrusion-fusion-type intercell connectors and process involving: casting the plate strap lugs to be welded from a hypoeutectic lead-antimony alloy containing at least about 2 percent by weight antimony; initially extruding the lugs into contact ... | 03/29/1977 |
