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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 6993879 | Molded plastic truss work A molded plastic truss work includes an upper grid and a lower grid, with a plurality of interconnecting members interconnecting the grids. The upper grid includes longitudinal members and transverse members that extend between and interconnect the longitudinal memb... | 02/07/2006 |
| 5570991 | Swing lock for a backhoe The present invention provides a control apparatus for controlling movement of an implement. The implement is mounted to a subframe that in turn is joined to a frame portion of the vehicle. The subframe is moveable between the working position, where the ... | 11/05/1996 |
| 5176485 | Freight manipulator with articulated cantilever boom A freight manipulator includes a mobile chassis positioned on a pair of guide tracks and have an articulated cantilever boom extending forwardly thereof. A tool carriage is mounted at the end of the boom and has a pair of freight engaging tools thereon fo... | 01/05/1993 |
| 4772175 | Space station erectable manipulator placement system An erectable manipulator placement system for use on a space station and comprising an elongate lattice-like boom having dual guide tracks attached to parallel chords thereof, a carriage-like dolly movable along said tracks, and a segmented maneuvering ar... | 09/20/1988 |
| 4102461 | Excavator with low center of gravity An excavator includes a vessel-like lower frame having a generally vertical side wall, and a bottom wall that forms a support plate. Wheel means are secured to the lower frame side wall, and an upper frame is mounted on the lower frame for rotation about ... | 07/25/1978 |
