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William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 6636392 | Thin-film magnetic head with magnetoresistive effect element A thin-film magnetic head with an MR element, includes an MR film, under films each having a multilayer structure with a first under layer and a second under layer laminated on the first under layer, and magnetic domain control films joined to side end fa... | 10/21/2003 |
| 6303666 | Process for the production of expanded olefinic thermoplastic elastomer products A process is provided for the production of expanded olefinic thermoplastic elastomer product having good external appearance, flexibility and heat resistance. This process features using, as raw materials, a particular olefinic thermoplastic elastomer an... | 10/16/2001 |
| 6269625 | Methods and apparatus for igniting a catalytic converter in a gas turbine system An energy producing system includes a compressor side for compressing an air/fuel mixture, and a turbine side for producing mechanical, electrical, and/or heat energy, and driving the compressor side. A catalytic combustor is disposed upstream of the turb... | 08/07/2001 |
| 6216420 | Device for heat sealing a tube of packaging sheet material filled with a pourable food product The device (1) for heat sealing a tube (3) of packaging sheet material filled with a pourable food product, has first and second jaws (8, 9) movable towards each other to grip the tube (3) under pressure and heat seal the tube. The first jaw (8) has a hea... | 04/17/2001 |
| 5955025 | Chemical vapor sterilization indicating materials Provided is a system for indicating exposure to a chemical vapor sterilization process. This system comprises a composition applied to a suitable support, which composition comprises a component which is chromatically transformed by the action of a vapor ... | 09/21/1999 |
| 5929709 | Protective circuit A protective circuit in a power amplifier is adapted, by limiting the maximum output current of the power amplifier and by quickly recharging compensating capacitors in the power amplifier, to limit the amount and duration of the power drain in the power ... | 07/27/1999 |
| 5852395 | Rogovski coil The Rogovski coil (1) is provided with a winding (2) applied to a winding support made from an insulating material. It has a central axis (4) and an opening (5), which is enclosed by the winding support and is penetrated by the central axis (4). A particu... | 12/22/1998 |
| 5714672 | Soybean designated elginEMS-421 A novel soybean seed and plant designated ElginEMS-421 having ATCC Accession No. 97617 and its descendents are provided. Such soybean seed exhibits an elevated palmitic acid (C16:0) content of at least 15.7% by weight based upon the total fatty acid conte... | 02/03/1998 |
| 5619104 | Multiplier that multiplies the output voltage from the control circuit with the voltage from the boost circuit An automatic illumination intensity control apparatus for a discharge lamp includes a chopper circuit for stepping up D.C. voltage obtained by rectifying commercial A.C. voltage, an invertor circuit for converting D.C. voltage output from the chopper circ... | 04/08/1997 |
| 5606174 | Method and device for detecting a shape of object with high resolution measurement of displacement of an object surface from a reference plane An arrangement for detecting a shape of object to measure any displacement of its surface from a reference plane with a high resolution, and to improve to precision of the measurement. This is attained by irradiating a projected light beam from a light so... | 02/25/1997 |
| 5578265 | Ferritic stainless steel alloy for use as catalytic converter material The invention provides a ferritic stainless steel alloy useful for strip steel used in exhaust catalytic converters, consisting essentially of in weight %, ࣘ0.02% C, 19-21% Cr, 4.5-6% Al, 0.01-0.03% Ce, 0.02-0.05% total of rare earth elements, ࣙ0.015%... | 11/26/1996 |
