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 |
| 8087362 | Cart and track arrangement A cart and track arrangement includes a track unit having a straight track and a curved track, the straight track having an oblique bearing portion, the curved track having a horizontal bearing portion, and a cart having a cart frame and a wheel set, the wheel set h... | 01/03/2012 |
| 6568332 | Guideway for a magnetically levitated railway with longitudinal stator linear drive and a parts set and method for making the same A guideway for a magnetically levitated railway is described, having a longitudinal stator linear drive comprising at least two parallel stators. The guideway includes a plurality of supports (1) arranged along a given line and adapted to form straight an... | 05/27/2003 |
| 5615784 | Crane counterweight installation and removal apparatus A counterweight installation and removal apparatus for a truck-mounted crane includes a counterweight having a bottom surface, a plurality of rollers attached to either the bottom surface of the counterweight or to a crane carrier deck, and at least one i... | 04/01/1997 |
| 5295624 | Contact surfaces of a track part and railway wheel To achieve low wear and hence a greater shape durability of track parts, it is proposed that the contact surface of a track part have a curvature having a constant difference ƊK in relation to the curvature of the corresponding current contact surface of... | 03/22/1994 |
| 5241911 | Conveyor system including a support rail with travel surfaces for driven support wheels of vehicles A conveyor system includes a support rail with travel surfaces for driven support wheels of vehicles, such as suspended or elevated trolleys or the like. An additional rail is provided for additional wheels which apply contact pressure to the support whee... | 09/07/1993 |
| 5170713 | Wheel assembly for a storage and retrieval machine A wheel assembly for a storage and retrieval machine which is travelable on a rail along a path adjacent overhead storage locations which store objects delivered to and retrieved from the locations by the storage and retrieval machine. The storage and ret... | 12/15/1992 |
| 4566391 | Support wheel for a camera dolly A support wheel device for a camera dolly, comprising four wheel suspension supports (1) each of which is disposed on the frame of the dolly at respective corners of a rectangle and on each of which at least one ground wheel (4) and at least one rail whee... | 01/28/1986 |
| 4550664 | Track wheel block A track wheel has an axially extended hollow hub with internally directed gear teeth capable of receiving an outer toothed driving shaft. The hub is supported by roller bearings in a bearing box from which the wheel may not be inadvertently removed once t... | 11/05/1985 |
| 4494464 | Castor wheel carriage A wheeled carriage is proposed which is capable of moving on rails to-and-fro, and of moving on a railless flat floor in any desired direction. The carriage has at least three pivotable wheel units. Each of these units consists of a first wheel and a seco... | 01/22/1985 |
| 4431227 | Railway friction wheel Method and device for enhancing the adhesion qualities of vehicle wheels through the use of a plurality of embedded members having exposed high frictional surfaces, which are capable of automatically being caused to attain frictional contact with a wheel ... | 02/14/1984 |
| 4355578 | Railway wheels and rails damping structures A system comprising a rail wheel and rail has the wheel and preferably also the rail provided with vibration dampers which absorb vibration having the frequency of the radial resonant vibration frequency of the wheel, for the purpose of preventing the for... | 10/26/1982 |
| 4230043 | Railway car wheelset and rails therefore An improved railway car wheelset having a novel wheel configuration that permits greatly improved performance on existing and improved track. This means that substantially higher rolling speeds can be achieved without loss of stability and while maintaini... | 10/28/1980 |
| 4058065 | Spring stub axle railway vehicle The railway truck disclosed herein is provided with a split axle composed of two transverse aligned axle members each having mounted on the outer end thereof a rail wheel. The inner ends of the axle members in one embodiment are connected by means forming... | 11/15/1977 |
| 4041877 | Lateral guidance device for wheel sets of rail vehicles Lateral magnetic guidance apparatus for laterally guiding a wheel set of a rail vehicle with respect to a support rail. The apparatus includes electromagnets carried with the wheel sets and positioned and controlled so as to effect return of the wheel set... | 08/16/1977 |
| 4022133 | Lateral truck movement control system A device for reducing the lateral movements of a railway vehicle caused by irregularities in the rail. The railway vehicle contains at least one wheel which is mounted for limited rotation around a generally vertical axis. A separate power-operated contro... | 05/10/1977 |
| 3967868 | Storage system A storage system comprising a plurality of generally aligned storage units, each of the units including at least two storage sections arranged in side-by-side relation, the units being supported for movement along a predetermined substantially linear path... | 07/06/1976 |