Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 7156226 | Multi-compartment storage container A multi-compartment container for storage of food, personal and miscellaneous items. The container has a base with a bottom and a circular sidewall. Radial dividers for a plurality of generally pre-shaped individual compartments which may be integral or removable. A... | 01/02/2007 |
| 6784397 | Mold release and anti-blocking coating for powder-free natural of synthetic rubber articles The present invention is directed to a release composition for molds and formers used in the production of natural and synthetic latex articles. The release coating contains a water-borne, high Tg polymer formed from at least one hydrophobic monomer and at least one... | 08/31/2004 |
| 4954686 | High speed RMS control apparatus for resistance welders and high speed RMS control method thereof A contol apparatus for a single-phase full-wave resistance welder in which anti-parallel connected thyristors are connected in series with a primary winding of a welding transformer and which controls a firing phase θn of the thyristors to adjust a weldi... | 09/04/1990 |
| 4532399 | Apparatus and method of welding nails to wires An improvement in a method of welding the shanks of successive nails to a pair of wires to form a series of wire connected nails suitable for packaging and use in a power driven fastener driving device which includes the steps of connecting a pair of elec... | 07/30/1985 |
| 4417122 | Resistance welding system for projection welding A resistance welding system having a low-inertia movable welding head coupled to a stationary welding transformer which is of low mutual reactance. Through an appropriate timing circuit and control, a high-energy pulse of current, of very short time durat... | 11/22/1983 |
| 3935530 | Compensation equipment for fluctuations in A.C. source voltage An AC voltage regulator which detects the instantaneous supply voltage in a phase shifter and compares it with the reference voltage by a comparator circuit so that in response to the output signals from the comparator, the firing angle of the thyristors ... | 01/27/1976 |
