...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
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| Number | Title | Issue Date |
| 7841308 | Rotary valve in an internal combustion engine A rotary valve engine using a single rotary valve serving multiple cylinders significantly increases both volumetric and thermodynamic efficiencies. A novel stratified three stage low temperature combustion system reduces both heat transfer loss and combustion proce... | 11/30/2010 |
| 7334558 | Slide body internal combustion engine An internal combustion engine includes a slide body having a plurality of rigidly mounted pistons on opposite ends of the slide body. The slide body reciprocates and is connected to a flywheel by shaft and bearing which extends through an angled track in the slide b... | 02/26/2008 |
| 7225767 | Conversion of an air-cooled engine to liquid cooling In some aspects of the invention the invention will relate to conversion of an existing VW air cooled engine to liquid cooling, and in still further aspects it will relate to the design of a water jacket to maximize heat rejection of a combustion chamber and piston ... | 06/05/2007 |
| 6318335 | Operating method of an internal combustion engine and corresponding internal combustion engine The invention relates to an operating method of an internal combustion engine. According to the method, a fuel-air mixture is rapidly combusted in order to move a piston. The fuel contained in or introduced into an occluded fresh gas is evaporated in the ... | 11/20/2001 |
| 5839399 | Cartridge-type rotary valve A two-way rotary manifold-selecting valve forming a combustion chamber for an internal combustion engine has a frusto-conical rotor nestingly residing in a housing having a frusto-conical passage communicating with the base of the housing. The housing has... | 11/24/1998 |
| 5000136 | Internal combustion engine with rotary valve assembly An internal combustion engine having a head with valve assemblies for controlling intake and exhaust gases to and from piston chambers. A head plate is located between the head and a block having cylinders accommodating pistons. The head plate has opening... | 03/19/1991 |
| 4953527 | Spherical rotary valve assembly for an internal combustion engine A spherical rotary valve assembly for an internal combustion engine of the piston and cylinder type wherein the spherical rotary valve assembly is positioned within a split cylinder head having an upper and lower section, such when secured defines a cavit... | 09/04/1990 |