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 |
| 5740771 | Computer controlled intake and exhaust valve A computer controlled intake and exhaust valve for internal combustion engines having a microprocessor controlled, hydraulically operated, valve actuator with manually adjustable variable performance settings for improving fuel efficiency and reducing emi... | 04/21/1998 |
| 5503123 | Internal combustion engine cylinder puppet valve having self-aligning guide A cylinder head assembly for an internal combustion engine includes self-aligning valve guides which are movable radially and coaxially to a variety of locations in which the axes of the valve guide and valve guide bore formed in the cylinder head are all... | 04/02/1996 |
| 4164209 | Internal combustion engine cylinder valve assembly A valve assembly for an internal combustion engine having a cylinder head including a combustion chamber and an induction passage terminating at a valve seat defining an inlet port to the combustion chamber in the combustion side of the cylinder head, inc... | 08/14/1979 |
| 4159704 | Articulated, spring-controlled intake valve An articulated, spring-controlled intake valve, for use in controlling induction flow through an intake port of an induction passage in an internal combustion engine, includes a valve head and a separate valve stem connected together by a hinge member wit... | 07/03/1979 |
