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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 |
| 7174850 | Multi-layered aquaculture system By directing the none-molting crustaceans to move into a predetermined area in a culture tank, the present invention discloses a multi-layered aquaculture system with shallow-water containers which is based upon the utilization of the methods and apparatus to elimin... | 02/13/2007 |
| 7094336 | Aquarium device with enhanced water filtration A desktop aquarium device with enhanced water filtration is provided. The aquarium device contains a base and a spherical tank. A filtering dish is installed inside the base. The filtering device provides a winding pathway for water to flow through. Along the pathwa... | 08/22/2006 |
| 6848395 | Method and structure for enhancing aquariums By adding an evacuated vertical structure onto a body of water where part of the structure extends above the body of water, the water level rises into the structure because of the vacuum. Use of the structure increases the overall volume of water in an aquarium and ... | 02/01/2005 |
| 6276303 | Aerator holder A holder (4) for retaining an aerator conduit (5) for placement on the bottom (6) of an aquarium tank (1). The holder has a trough with at least one side wall (11a,b) and a retaining means, such as channel (12), in the trough. The holder may be supported ... | 08/21/2001 |
| 6039005 | Aquatic habit extension device An aquatic habitat extension device uses a circulation assembly to reversibly maintain a volume of water above the surface of an underlying body of water. The aquatic extension can be used alone or with other similar aquatic habitat extensions that themse... | 03/21/2000 |
| 5947058 | Aquarium pumping system having enough suction head An aquarium pumping system includes: a container having a pump installed in the container and having sand filled in the container, a discharge tube connected between the container and an aquarium for delivering water into the aquarium, a suction tube conn... | 09/07/1999 |
| 5605115 | Tubular aquarium system An aquarium system is provided for displaying marine life. The aquarium includes a reservoir for receiving water therein, the water in the reservoir defines a reservoir water level. A tank is positioned above the reservoir also for receiving water therein... | 02/25/1997 |
| 5535702 | Aquarium sea current generator A sea current generator aquarium including an air-tight water chamber located at one end of the aquarium with an opening into the aquarium extending across the bottom of the chamber. A constant flow air pump connected to the top of the water chamber for p... | 07/16/1996 |
| 5447123 | Aquarium extension assembly An apparatus for use with an existing aquarium tank for extending the aquarium tank includes an extension tank having opposite side walls, a top wall, an open bottom, an interior chamber and a shoulder between the top wall and the bottom wall for supporte... | 09/05/1995 |
| 5317991 | Double-layer aquarium with fluctuating water levels An aquarium includes a lower hollow body which defines a lower chamber and an upper hollow body which defines an upper chamber. A mount plate is removably mounted in a bottom of the lower chamber and a waterproof housing is provided on the mount plate to ... | 06/07/1994 |
| 5174239 | Sealed-type aquarium device A sealed-type aquarium device capable of permitting a viewer to feel unexpected and marvelous interest in addition to enjoyment through observation of fish. The aquarium device includes a sealed aquarium body which is constructed so as to prevent air from... | 12/29/1992 |
| 5067439 | Aquarium hydro hi-rise and crossover bridge assembly A system is provided which facilitates the filling and operation of a crossover bridge (30) for aquarium tanks (12, 40). A pump (58) is combined with a plurality of end sealing devices (56, 72) and a closeable aperture (38) in an intermediate vacuum porti... | 11/26/1991 |
| 4300478 | Aquarium structure The aquarium is formed such that the upper extremity of the structure is positioned above its access opening. The access opening is configured such that air may not enter the upper extremity of the aquarium directly and, consequently, atmospheric pressure... | 11/17/1981 |
| 3991715 | Attachment for aquarium tanks A device is provided which provides an extension of the water media above the surface of a fish aquarium so that fish in the aquarium can swim above the surface and provide an increase in entertainment because the fish appears in more detail and in a nove... | 11/16/1976 |
