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| Number | Title | Issue Date |
| 4691741 | Shroud for aircraft duct The shroud is formed from sheet material and is cylindrical in shape. A plurality of spacers are associated with the sheet material. These spacers are designed to engage the outer surface of a duct to hold the cylindrical sheet material in radially outwar... | 09/08/1987 |
| 4411034 | Blanket device with alarm A blanket is held in position on a bed by means of adjustable electrically conductive snaps connected between the blanket and the sheet or mattress cover. The snaps are connected to an electrical circuit in such a way that an alarm sounds when the snaps a... | 10/25/1983 |
| 4249228 | Housing for an electrical circuit A housing for an electrical circuit is to be releasably mounted in an explosion-proof box without modifying the structure of the box. The housing is provided with at least one spring which extends away from the housing into engagement with an inner surfac... | 02/03/1981 |
| 4208072 | Stackable stool A support for stools or tables is formed from two identical hollow plastic sections. The sections are generally conical in shape so that they can fit inside each other for stacking purposes when not in use. The smaller end of each section is provided with... | 06/17/1980 |
| 4167706 | Two-wire frequency to DC converter A two-wire frequency to DC converter utilizes a multistage binary counter which is controlled by a crystal oscillator and the input frequency. This arrangement provides precisely shaped square wave pulses at the output of the counter whose frequency is fu... | 09/11/1979 |
| 4165107 | Flexible ball joint The flexible ball joint is provided with a bellows which is protectively mounted inside a shell. A portion of the shell serves as the spherical socket and a portion of a sphere serves as the ball for the ball joint. The ball is mounted in the socket and i... | 08/21/1979 |
| 4150851 | Seat for bicycles and the like A hollow seat post has a seat attached at one end while the opposite end is split defining an aligning pin receiving groove. One portion of the split end is provided with longitudinally spaced pin receiving holes. A coil spring is inserted inside a frame ... | 04/24/1979 |
