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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 |
| 4689748 | Device for aircraft and spacecraft for producing a digital terrain representation A device for use on aircraft or spacecraft provides data corresponding to the course and orientation of the craft, and a digital display of the terrain over which the craft is travelling. The device includes at least first, second and third sensor lines c... | 08/25/1987 |
| 4667801 | Clutch disc arrangement A cluch disc of a motor vehicle clutch comprises a clutch disc hub and a hub flange integral therewith. The hub flange is provided with a plurality of coherent windows each of which receives both a helical compression spring and an interconnection bolt in... | 05/26/1987 |
| 4666280 | Flash shot control device for camera A flash shot control device for a camera in which the angle of flash lighting is controlled in accordance with the output of a backlight detector. On assumption that a subject of principal photographic interest takes its place at the center of the field o... | 05/19/1987 |
| 4660075 | Color information detecting device A color information detecting device comprising a plurality of color detecting apparatus for detecting respective different color lights from each other, converting apparatus for producing an output in non-linear relation to the input signal, changeover a... | 04/21/1987 |
| 4658232 | Electromagnetic device An electromagnetic device for use in, for example, the diaphragm control of a camera. The electromagnetic device includes an electromagnet, an armature, an armature shaft and a restricting member for inclining the armature with respect to the armature sha... | 04/14/1987 |
| 4657569 | Equipment for the generation of cavitation Apparatus for generation of cavitation within a flowing liquid, wherein expenditure for equipment for purposeful generation of cavitation and control of the cavitated liquid portion can be achieved by passing the liquid from a high-level reservoir through... | 04/14/1987 |
| 4656843 | Apparatus for the automatic concentration control of aqueous caustic soda solution An apparatus for the automatic concentration control of an aqueous caustic soda solution in a cloth treating tank through which a cloth to be treated is continuously transported, comprising the provision of a means for adding a neutralization agent to a s... | 04/14/1987 |
| 4656466 | Electro-optic display device A display device in which display contents to be displayed by a display element such as a liquid crystal, as well as display portions and display forms can be recognized and display patterns can be easily recognized in cases where complicated photographin... | 04/07/1987 |
| 4654328 | Method for controlling sanitary and agricultural pests The invention provides a novel method for controlling various kinds of pests harmful against sanitation and agriculture by applying an organosilicon compound, never used hitherto for such a purpose, to the body of the pest or distributing the organosilico... | 03/31/1987 |
| 4647306 | Process for the treatment of metal melts with scavenging gas In a process for the treatment of metal melts, such as steel melts, with scavenging gas in a ladle under reduced pressure, inert scavenging gas is supplied through a plurality of inlet devices, such as scavenging gas supply bricks, built into the ladle bo... | 03/03/1987 |
| 4642997 | Process and apparatus for power-and air conditioning-fresh air generation in aircraft A process of and a device for power- and air-conditioning fresh air generation in an aircraft, which are equipped with main power plants and an auxiliary power unit driving an air-conditioning compressor, both of which are supplied with air-conditioning e... | 02/17/1987 |
| 4641937 | Self-timer device for a camera A self-timer device which announces its operation with sounds, and in which the sound volume or loudness changes in accordance with environmental sound or exterior noise around the camera so as to always tell the operator with a proper sound that the self... | 02/10/1987 |
| 4640759 | Supported medium for electrophoresis and supports therefor A process for electrophoresis employing a medium wherein the potential gradient along the direction of electrophoresis is made larger at both side portions of the medium than at the center portion thereof. A medium for employable for said process in that ... | 02/03/1987 |
| 4639942 | Procedure for measuring the quantity of silicon coating on paper or cardboard The present invention concerns the measuring of a silicon coating on paper or cardboard moving in the form of a continuous web and which may as fillers contain substances containing silicon such as kaolin, or aluminum silicate. By x-ray radiation from a p... | 01/27/1987 |
| 4639162 | Drawing lock for torque transmitting engagement between two shaft members arrestable in the open position In a mechanism for connecting together in torque transmitting engagement a coupling sleeve and a power takeoff shaft, particularly in agricultural implements, there is provided a drawing lock which may be arrested in the open position. The drawing lock in... | 01/27/1987 |
| 4639096 | High range zoom lens The disclosed zoom lens is composed of four lens groups. Counting from the front, the first lens group has a positive power, the second a negative power, the third a positive power and the fourth a positive or a negative power. At least the first, third a... | 01/27/1987 |
| 4639095 | Telephoto zoom lens A telephoto zoom lens having three lens groups of which the 1st, counting from front, is of positive refractive power, the 2nd is of negative refractive power, and the 3rd is of positive refractive power, wherein the aforesaid 1st and 2nd lens groups are ... | 01/27/1987 |
| 4638390 | Recording apparatus A recording apparatus for recording an information signal on a record bearing medium comprises recording means for recording the information signal on the record bearing medium, instruction means for producing an instruction to stop a recording operation,... | 01/20/1987 |
| 4638365 | Image sensing device An image sensing device comprises a stop to control the quantity of light coming from an object to be photographed; an image sensor; an automatic light quantity control system to control the stop according to a signal produced from the image sensor; a gai... | 01/20/1987 |
| 4636283 | Apparatus for the distillation of fresh water from sea water In the distillation of fresh water from sea water, the sea water is passed ownwardly in a falling film evaporator through a multiplicity of vertical tube evaporator (VTE) stages and multiple stage flash (MSF) evaporators. After the sea water passes through... | 01/13/1987 |
| 4636123 | Expansion anchor assembly An expansion anchor assembly includes an expansion sleeve formed at least in part by axially extending extension sections, an expansion body and an anchor rod attached to the expansion body. By pulling the expansion body into the end of the sleeve formed ... | 01/13/1987 |
| 4636042 | Mechanical mounting for zoom lens A mechanical mounting for a zoom lens having a tubular body in which is rotatably fitted a cam sleeve for controlling the axial movements of optical elements contributing to a zooming action. In order to keep the axial position of the cam sleeve relative ... | 01/13/1987 |
| 4634399 | Structural component for transmitting torque A coil-shaped body is used to transmit torque between shafts spaced axially apart and with the shaft axes disposed angularly to one another. Such an arrangement is used in a bent steering column for a safety steering mechanism. The coil-shaped body is for... | 01/06/1987 |
| 4634219 | Optical low-pass filter An optical low-pass filter has a diffraction grating structure wherein flat faces which are perpendicular to the optical axis of an imaging lens and slanting faces which are slanting relative to the flat faces are at a predetermined pitch.... | 01/06/1987 |
| 4634094 | Shutoff valve A shutoff valve includes a pivotably displaceable flap shaped cutoff part mounted in a flow passageway through a housing. The flap shaped cutoff part is relatively thin so that in the fully open position it does not appreciable reduce the flow passageway ... | 01/06/1987 |
| 4634087 | Grooved rail switch with a tongue rail device A grooved rail switch with a tongue rail device includes a tongue rail displaceably supported on a torsion-stiff support box for movement between a stock rail and a switch rail. The support box is made up of an upper slide plate, a lower bottom plate and ... | 01/06/1987 |
| 4633540 | Tension tie member A tie member includes at least one tension element, such as a steel wire or strand, enclosed within a tubular sheathing. An anchoring unit is located at each end of the tie member for transmitting the tension force to a part of a structure. Each anchoring... | 01/06/1987 |
