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A beach chair which can be adapted for a woman who is pregnant and wishes to sunbathe in the prone position.
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| Number | Title | Issue Date |
| 4618855 | Soil pollution monitoring system A soil pollution monitoring system includes a plurality of ducts for conveying gases and air past a sensing device. The sensing device detects selected compounds in the gases and air and provides an output in electrical form which indicates whether or not... | 10/21/1986 |
| 4354180 | Electro-optical liquid level sensor A low liquid level electro-optical probe is made self-checking by providing the same with means for intercepting a portion of the usual light beam and constantly reflecting such portion to the usual receiving electro-optical transducer to constantly gener... | 10/12/1982 |
