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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 |
| 4890269 | Heliochron A helichron having a box-like housing to which a cover is pivotally hinged. A magnetic compass is positioned in the box-like housing at a predetermined directional orientation. A 360 degree spirit level is also positioned within the box-like housing. The ... | 12/26/1989 |
| 4887250 | Apparatus for reproducing the appearance of heavenly bodies An apparatus for reproducing the appearance of heavenly bodies including a cover having an opaque wall defining a substantially circular opening, and a disc-like or spherical part representative of a heavenly body sized to substantially fill the opening i... | 12/12/1989 |
| 4881213 | Watch movement having date and phases of the moon indicators A watch movement has indicators for the date and the phases of the moon, these two indicators being automatically driven by the same intermediate revolving wheel member effecting one revolution every 24 hours, the one indicator by one tooth longer than th... | 11/14/1989 |
| 4853908 | Timing mechanism with tide indicator A timing mechanism having a tide indicator including a window in its dial. Under the dial is placed a flat annular wheel fitted with two signs or indicator markings which appear in turn in the window. Around the edge of the window are additional indicator... | 08/01/1989 |
| 4825426 | Horometric arrangement for indicating the position of the planets In the arrangement of this invention the position of the planets is displayed by means of a disc and rings concentric thereto, the display surfaces of which are arranged substantially in the same plane.... | 04/25/1989 |
| 4782472 | Solar clock with digital time display A solar clock utilizes the sun's radiant energy to illuminate a digital display in accordance with the solar time. An opaque mask member, preferably in the form of a right circular cylinder, is provided with a series of sunlight-transmitting apertures whi... | 11/01/1988 |
| 4766579 | Timepiece having a control stem correcting mechanism with at least two setting positions A basic clockwork, initially arranged in such a way as to comprise two supplementary indicators, of the date and of the days of the week, which have been removed, is provided with an additional module carrying supplementary indicators, which can number tw... | 08/23/1988 |
| 4759002 | Clock A clock having a housing which contains two internal disks and a motor for rotation of those disks on a shaft is disclosed. An hour disk is provided having a shaded region representing night and an unshaded region representing day. The hour disk is positi... | 07/19/1988 |
| 4731767 | Timepiece having a star display A wristwatch with a star map disk rotatably mounted in a caser and a gear train for rotating the star map disk at a speed of one revolution per one sidereal day. A star map is provided on the star map disk. The star map includes bright and constellation f... | 03/15/1988 |
| 4674889 | Watch A watch having a crown for setting the motion work and having a device, which can be driven by the hour wheel of the movement of the watch, for the automatic display of the months and the days of the month in accordance with the Gregorian calendar. In thi... | 06/23/1987 |
| 4659231 | Islamic prayer calculator/clock device Means are provided for inputting to an electronic computing device the latitude and longitude of a spot on the surface of the Earth, and also for inputting a date, and the computing device then calculates the proper Islamic prayer times at said spot on sa... | 04/21/1987 |
| 4656748 | Sundial arrangement The present invention relates to a sundial arrangement comprising a screen portion provided with several slits allowing the passage of a narrow flat beam of solar rays and angularly spaced from one another to be successively traversed by the beam; a dial ... | 04/14/1987 |
| 4645354 | Universal heliochronometer A heliochronometer (10) for providing accurate clock time readouts at any known latitude and longitude location on the earth including, a base (15) to effect precision orientation and level mounting and having an unpstanding post (40), a latitude member (... | 02/24/1987 |
| 4551027 | Device for determining time of sunrise and sunset A device for determining the time of solar passage of the horizon. The device includes a clock face having hour and minute indications arranged circumferentially thereof and a disc rotatably mounted in overlying relation with the clock face. Solar passage... | 11/05/1985 |
| 4548512 | Watch with indicator of lunar phases Watch with moon phases indicator constituted by a moon phases indicating member (14) partly appearing through the moon wicket (13A) of a moon phases indicating member (13) in such a way that it represents the shape of the moon as a function of the quarter... | 10/22/1985 |
| 4520572 | Geographical sundial A sundial comprising a transparent hollow globe marked with latitude and longitude lines and including a map of the world is mounted on a stationary base. The globe is adjustable with respect to the base to enable the polar axis to be inclined toward a ge... | 06/04/1985 |
| 4497582 | Planetarium alarm clock A hemispherical dome of opaque thin material is pierced with small openings in patterns conforming to the appearance of constellations in the sky. Mounted on a rotating cylinder, the dome is turned by an electric motor at adjustable speeds. A light source... | 02/05/1985 |
| 4487511 | Watch for the space orientation in addition to the time orientation A watch adapted for use as a compass in addition to indicating local and remote times. The watch is provided with a dial, supplemental pointer, a microprocessor, and a keyboard for introducing selected data and operations into the microprocessor. The watc... | 12/11/1984 |
| 4421421 | Kinetic clock sculpture A time keeping clock that includes a kinetic clock sculpture arrangement in which the clock comprises the usual minute and hour hands journalled for rotation in clockwise directions about a common axis, and a time keeping mechanism for driving said minute... | 12/20/1983 |
| 4396293 | Salat time alarm electronic timepiece A salat time alarm electronic timepiece is implemented with a one chip microcomputer. An outer read only memory is installed in the electronic timepiece for storing the sunrise time data and the sunset time data at various cities in world. The system read... | 08/02/1983 |
| 4387999 | Electronic sundial apparatus An electronic sundial apparatus which signals the passage of each hour by a chime, bell or other audible indication and which requires no external source of power other than the sun. Inner and outer concentric hemispheres with vertically extending apertur... | 06/14/1983 |
| 4334297 | Globe clock device and methods of making and using the same The present invention relates to a globe clock which includes an earth sphere rotating at a rate of 1 revolution per minute, a moon sphere orbiting the earth sphere at a rate of one revolution per 12 hours and a satellite sphere orbiting the earth sphere ... | 06/08/1982 |
| 4253169 | Electronic calculation watch with digital display An electronic watch with circuitry to calculate and display time under the Moslem calendar.... | 02/24/1981 |
| 4135357 | Solar chronometer A solar chronometer in which a style is aligned with the celestial pole and an equatorial member, preferably in the shape of a ring, is aligned with the equator. The style and equatorial member cast shadows upon a chart and the point where the shadows int... | 01/23/1979 |
| 4136397 | Astronomical timepiece A method and apparatus for determining local solar time for virtually any location on any planet having a radiating sun, wherein the method requires minimal a prior knowledge of the planet's major characteristics and the apparatus is organized so as to pe... | 01/23/1979 |
| 3940859 | Unitary space transit An instrument is provided which requires no complex computations or high degree of skill in aligning scales to accurately indicate the time of day from observations of the position of the sun, and to accurately locate the moon, the sun, and other stars an... | 03/02/1976 |
