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| Number | Title | Issue Date |
| 4932676 | Roller skate having three control modes A roller skate is provided having a body portion adapted to be attached to the foot of a wearer, and front and rear axles attached to the body portion, the axles having wheels mounted to the ends thereof. At least the front wheels are characterized by an ... | 06/12/1990 |
| 4924963 | Compact and efficient sub-woofer system and method for installation in structural partitions A loudspeaker system is provided for installation in a space between a front panel and an enclosed area behind the front panel of a partition such as a wall, ceiling or floor fronting a listening area. Electroacoustical transducers are provided which have... | 05/15/1990 |
| 4903300 | Compact and efficient sub-woofer system and method for installation in structural partitions A loudspeaker system is provided for installation in a space between a front panel and an enclosed area behind the front panel of a partition such as a wall, ceiling or floor fronting a listening area. Electroacoustical transducers are provided which have... | 02/20/1990 |
| 4792407 | Oxidation of organic compounds in water A method of oxidizing organic compounds in aqueous solutions by using in combination ozone, hydrogen peroxide and ultraviolet radiation is provided.... | 12/20/1988 |
| 4546382 | Television and market research data collection system and method A data gathering system includes a plurality of remote units which are controlled from a central location. Each of the remote units is attached to a television receiver which is generally but not necessarily attached to a cable system. Each of the remote ... | 10/08/1985 |
| 4543507 | Self-supporting rotor coil for dc-machine A cylindrical, ironless, self-supporting rotor coil for use in an electrical dc-machine is disclosed. The coil is formed by at least one layer of wire, the wire having a conductive core, an insulating layer surrounding that core and an outer layer compris... | 09/24/1985 |
