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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 |
| 7338257 | Device for interacting with a fluid moving relative to the device and vehicle including such a device A device (10) for interacting with a fluid (12) moving relative to the device. The device comprises a body with an axis of rotation (22) and a periphery (24). The body is rotatable about the axis of rotation. The device also comprises a p... | 03/04/2008 |
| 6923622 | Mechanism for extendable rotor blades for power generating wind and ocean current turbines and means for counter-balancing the extendable rotor blade A power generating system wherein a turbine is mounted on top of a tower or tethered underwater. The turbine includes a rotor having a main blade section connected to a rotor hub and an extender section. An adjusting device positions the extender section between a r... | 08/02/2005 |
| 5884809 | Air separating fuel dispensing system A dispensing system (20) for drawing fuel from a storage tank (22) to a nozzle (44). The system includes an above-tank suction pump (26) which draws fuel from the tank. The fuel is discharged from the suction pump into a vertically aligned air separator (... | 03/23/1999 |
| 5620304 | Rotor system having alternating length rotor blades and positioning means therefor for reducing blade-vortex interaction (BVI) noise A Variable Diameter Rotor (VDR) system (4) having telescoping odd and even blade assemblies (Ob, Eb) wherein the odd blade assemblies define a radial length RO and the even blade assemblies define a radial length RE. | 04/15/1997 |
| 4789297 | Enclosed wind device mechanism with eccentric rotor shaft A wind drive mechanism (10), comprising a housing (16) with a wind entry opening (25) and a wind outlet opening (26). In the housing (16) a rotor (30) is arranged with a vertically extending rotor shaft (31). The rotor shaft (31) is offset from the middle... | 12/06/1988 |
| 4519742 | Apparatus for utilizing the energy present in flowing water A rotatable shaft is provided with a plurality of blades each fixed at one end to the shaft and extending radially outwardly therefrom. Each of the blades has at least one gate or opening for the passage of fluid therethrough, and a slide movable between ... | 05/28/1985 |
| 4402650 | Vertical axis rotor A wind-operated rotor, including at least one or more horizontal propellers, mounted along a vertical shaft of a generator secured upon a tower, so as to generate electrical power; a hollow cone secured in opposite directions at the outer ends of each pro... | 09/06/1983 |
| 4385497 | Propulsion system for water wheel A propulsion system for a water wheel of the type having a plurality of pontoons interconnected in diametrically opposed pairs by means of spokes which are slidably carried by the water wheel so that the pontoons on the downwardly moving side of the water... | 05/31/1983 |
| 4311918 | Wind powered generator with gravity assisted mechanical advantage booseter The wind powered mechanical and electric power generator, is a process and apparatus which uses the mechanical advantage of a lever arm to multiply the energy of a moving or mobile weight which is wind powered from a propeller drive, and converts by gravi... | 01/19/1982 |
| 4301981 | Aircraft with rotary wing An aircraft is provided with a wing in the form of an annulus having an airfoil shape in radial section, the wing being concentrically mounted on a vertical axle shaft which in turn is rotatably carried by a mounting on the fuselage. Rotation of the wing ... | 11/24/1981 |
| 4256970 | Apparatus for the exploitation of underwater currents for the production of electrical energy A rotor having slidable blades is employed to efficiently produce electrical energy from underwater currents. The device includes a structure having four columns which rises from the seabed and supports a circular monorail system. A circular housing fits ... | 03/17/1981 |
