Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4852408 | Stop for integrated circuit diaphragm A semiconductor transducer with a diaphragm is constructed utilizing a substrate wherein a first portion of that first face is etched to a planar level to achieve a second portion as a physical stop on this substrate, the physical stop having a planar sto... | 08/01/1989 |
| 4789761 | Appliance timer A motor assembly having a field plate and a gear train mounted on at least one face of the field plate. The field plate defines an aperture which, in turn, defines a plurality of field poles for a rotor mounted in the aperture. A field coil is wound about... | 12/06/1988 |
| 4766927 | Abrasive fluid control valve with plastic seat A valve to control abrasive fluids under high pressure has a plastic seat. A circular ridge peripherally formed on the valve cartridge sealingly engages the seat. A means is provided within the valve cartridge to support the seat axially and radially. The... | 08/30/1988 |
