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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 |
| 5423101 | Dismountable bridge with tension elements and adjustable boom A dismountable bridge comprises at least one bridge section including a top deck and a bottom boom disposed underneath the top deck. The bottom boom includes a mechanism for adjusting the length of the bottom boom. Rigid end supports each have one end hin... | 06/13/1995 |
| 5329652 | Deployable bridge and vehicle for laying the bridge A deployable bridge includes a plurality of identical bridge sections each having two identical track elements. Each track element has a roadway carrier, a bottom boom and adjustment elements connecting the bottom boom with the roadway carrier. The bottom... | 07/19/1994 |
| 5293658 | Separable bridge A separable bridge, particularly useful for military purposes, having bridge modules which can be coupled together and whose roadway elements, diagonal elements and lower chords form a vertically adjustable framework. The lower chords of the bridge module... | 03/15/1994 |
| 5042101 | Collapsible bridge A collapsible bridge for military purposes is assembled from a plurality of similarly constructed and interconnected bridge elements, each including two track plates, two girders and several length adjusted diagonal struts and tie rods, interconnected and... | 08/27/1991 |
| 4962556 | Lightweight, collapsible bridge module, and system with deployment and retrieval trailer A modular lightweight bridge comprises a pair of tubular truss formed spans, each of which include a plurality of modules hinged to one another at locations on the bottom of the bridge for folding the bridge for transport prior to deployment of the bridge... | 10/16/1990 |
| 4353190 | Stiffened elongate support member An elongate support member of the type generally used to span a pair of horizontally spaced supports is stiffened by pivotally attaching thereto at spaced points along its length at least two posts which extend in the same general direction and generally ... | 10/12/1982 |
| 4143439 | Bridge reinforcements This invention provides an improved reinforcement for a bridge span, the reinforcement including a reinforcing member for attachment in an underslung position to the span, a reinforcing strut adapted at its first end for pivotal connection to a point inte... | 03/13/1979 |
| 4017932 | Temporary, modular, self-erecting bridge A temporary, modular, self-erecting bridge which can be transported from place-to-place by collapsing the side, top and bottom elements about pivot points to achieve a narrow and shorter unit. Hydraulic jacks or other fluid actuated mechanisms are used to... | 04/19/1977 |
