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...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 |
| 7918095 | Heat actuated cooling system The system uses a batch method process absorption cooling through a number of separate sealed two compartment containers which are moved physically between a heating area, a cooling area, a storage area and a refrigeration area. Pressure differentials alone between ... | 04/05/2011 |
| 7762934 | Exercise apparatus based on a variable mode hydraulic cylinder and method for same The invention is a hydraulic cylinder for use in exercise machines to deliver a controllable fast acting force. The invention uses a hydraulic cylinder with features that allow high acceleration rates, rapid changes of force level and direction, and positive force l... | 07/27/2010 |
| 7648450 | Method and apparatus for physical fitness training An apparatus for physical fitness physical strength, agility and endurance training. A controllable pressurized flow of fluid is first received via a hose to a source of the pressurized fluid. In response to this flow of fluid, a force is generated along at least on... | 01/19/2010 |
| 7614397 | Solar energy storage system A method and apparatus for storing, transporting, and releasing high grade, thermodynamically useful energy for a wide variety of uses. Solar energy is collected and reflected onto a heat storage container using a three-mirror reflecting system. This invention invol... | 11/10/2009 |
| 7547269 | Method and apparatus for physical fitness training An improved method and apparatus for physical strength, agility and endurance training uses fluid jet reaction forces to train and strengthen muscles. The device for physical training includes a source of pressurized fluid connectable through a hose to a propulsion ... | 06/16/2009 |
| 7322865 | Belt drive propulsion system An apparatus and method for providing propulsion to naval vehicles by using one or more suspended belt drives to consistently engage the water proximate to the surface using a variety of belts with multiple attachments, tires, or variable lugs. The drive belt system... | 01/29/2008 |
| 7322267 | Enhanced light weight armor system with reactive properties A light-weight armor system for retrofitting onto light vehicles, such as HMMWVs, trucks, or helicopters, or incorporating into a vehicle to protect against HEAT or high explosive warheads. The armor system comprises multiple layers of a thin metal film. The front s... | 01/29/2008 |
| 7121354 | Fire extinguishing device and method A fire extinguishing device and associated methods. The device is adapted to be positioned in proximity to a fire and operable in response to heat output by the fire. The device includes a first reservoir, containing a fluid, adapted to receive the heat from the fir... | 10/17/2006 |
