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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 |
| 6675398 | Diverter for use with tank valves to direct flow to tank or rim A diverter valve for selectively passing water from a ballcock valve directly to a water storage tank or to the rim of a toilet. It includes a diverter plunger which places a deflector into the path of water from the ballcock, and a float which removes th... | 01/13/2004 |
| 5920920 | Straight trap toilet apparatus A straight trap toilet apparatus mainly comprises a main body with a straight trap, a piston, and a toilet bowl. The water outlet of the main body is connected to a waste pipe, and the top of the main body is mounted below the toilet bowl. The main body h... | 07/13/1999 |
| 5862538 | Toilet flushing device A toilet flushing device is to be installed in a water supply tank and has a diverter valve which permits the supply of high pressure water to the rim flushing conduit of a toilet bowl when the toilet bowl is flushed. The diverter valve has a valve housin... | 01/26/1999 |
| 5742951 | Inlet valve mechanism An interlock mechanism (6-9, 41-47) for a cistern or flush tank (1) has an underwater flush valve (3). The interlock mechanism is linked with the float arm (7, 57) of an inlet valve (5, 50). The interlock mechanism latches the float arm in its raised posi... | 04/28/1998 |
| 5351713 | Effect-enhancing structure for rinsing a flush toilet An effect-enhancing structure for rinsing a flush toilet includes a plurality of sets of a water-supply device and a floating ball, a trunk duct conducting water into a water case, a distributing duct set transversely and connected to the trunk duct, stop... | 10/04/1994 |
| 5175894 | Toilet flushing device A toilet flushing device has a diverter valve which permits the supply of high pressure water to the rim flushing conduit of a toilet bowl when the toilet bowl is flushed, thereby enhancing the flushing of the toilet bowl. The diverter valve has provision... | 01/05/1993 |
| 4996726 | Accelerated rim wash for a toilet A fill valve (36) has a main valve (34) with a control chamber (44) for controlling the on and off actuation of the main valve. A tube (58) is in fluid communication with chamber (44) and extends into the water at the fill level (46) in tank (10). The flu... | 03/05/1991 |
| 4918763 | Water closet with supplemented rim wash water flow A water closet is disclosed having a bowl with rim wash outlets and a tank connected thereto containing flushing water at a level where most of the water will not flow by gravity through the bowl rim outlets. A tank water withdrawing device is mounted in ... | 04/24/1990 |
| 4408361 | Diverter valve A diverter valve for a fluid storage tank such as the storage tank of a water closet is disclosed. In one embodiment, the diverter valve has a housing with an inlet passage for receiving a supply of water and a pair of outlet passages. One of the outlet p... | 10/11/1983 |
| 4407025 | Water-conserving toilet A water-conserving toilet is disclosed and includes a bowl for receiving waste and a waste outlet extending laterally from the bowl and defining a first, shallow trap arranged so that a relatively shallow body of liquid is normally retained in the bottom ... | 10/04/1983 |
| 4310934 | Water-conserving toilet A water-conserving toilet is disclosed and includes a bowl for receiving waste and a waste outlet extending laterally from the bowl and defining a first, shallow trap arranged so that a relatively shallow body of liquid is normally retained in the bottom ... | 01/19/1982 |
