Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7370725 | Motorized rungless ladder A device supported by a ground surface and a structure for at least one of elevating and descending a user. The device includes a first guide rail having a first channel extending along a length thereof and a second guide rail having a second channel extending along... | 05/13/2008 |
| 7213717 | Telescopic boom The within invention concerns a telescopic boom of a crane with a pivot section, telescopic sections that can telescope out of the pivot section, and a guying that has at least one guy stand housed to pivot on one of the sections, and at least one guy cable supporte... | 05/08/2007 |
| 7201255 | Apparatus and method of forming a corrosion resistant coating on a ladder A ladder structure for enhancing corrosion resistance is disclosed, which comprises a ladder including a pair of rails and a plurality of rungs extending between and mounted on the rails. At least one of the rails and at least one of the rungs of the ladder comprise... | 04/10/2007 |
| 7178631 | Aerial ladder cradle assembly A cradle assembly for aerial ladders (or booms) includes an assembly for rotatably and pivotally supporting an aerial ladder or boom, a first pair of upwardly extending parallel support flanges and a second pair of upwardly extending parallel support flanges extendi... | 02/20/2007 |
| 6923214 | Device for servicing an aircraft on the ground A device for servicing an aircraft on the ground includes a rolling support and a cable or hose assembly having a first end for connection to a ground unit and an opposite second end for connection to the aircraft. A reel is rotatably mounted on the rolling support ... | 08/02/2005 |
| 6467576 | Aerial life saver combine The "Aerial Life Saver Combine" is a multipurpose mobile safety system that is used in relation to work performed on top of any kind of vehicle or on stationary structures where fall safety protection for workers in service, maintenance and construction i... | 10/22/2002 |
| 5295555 | Hydraulic deer stand A wheeled trailer chassis is provided including a flat load bed and a rear end pivotally mounted loading ramp swingable between an operative rearwardly downwardly inclined position and an upright position closing the rear of the load bed. An ATV also is p... | 03/22/1994 |
| 4754840 | Leveling assembly for work platforms on articulating booms An apparatus for retaining the attitude of a platform on an articulated boom is provided. The apparatus includes master-slave piston cylinders for adjusting the attitude of the platform relative to a reference object. The apparatus further includes a pivo... | 07/05/1988 |
| 4589518 | Revolving block for high place working vehicle A revolving block having an inclination correcting mechanism housed therein is adapted to revolvably support a working implement, such as a ladder or boom, mounted on a high place working vehicle.... | 05/20/1986 |
| 4396093 | Ladder or boom extension system A ladder or boom extension system includes a base section, at least one movable section in telescoping arrangement with the base section, and a piston rod fixedly connected longitudinally of the base section. A double acting hydraulic cylinder is movable ... | 08/02/1983 |
| 4195708 | Work chair for aerial lift The chair is suspended from a elevated aerial ladder and hangs by gravity in a stable manner. The stability enables a worker, such as a sign painter, to be seated while performing his task without being disturbed by tilting and swaying. The stability is d... | 04/01/1980 |
| 4185716 | Self closing gate An improved ladder supported rescue platform for use as an evacuation tool is disclosed. The platform includes a peripheral rail system wherein a gate can be raised vertically by a worker to enter the platform from the ladder or to enter the ladder from t... | 01/29/1980 |
| 4049079 | Tractor mounted apparatus for performing aerial work tasks An aerial work task apparatus comprises a pair of laterally spaced lift arms pivotally mounted on the frame of a tractor and a double-acting lift cylinder pivotally interconnected between the frame and each lift arm. A platform, adapted to carry a workman... | 09/20/1977 |
| 3963095 | Auxiliary extension platform assembly support frame drive means for an aerial ladder assembly A vehicular mounted, multiply-articulated aerial lift and ladder assembly comprised of a terminally affixed and partially enclosed platform member pivotally connected to a linked parallel bar assembly having a ladder section as the outward longitudinal el... | 06/15/1976 |
| 3961685 | Ladder working limit based ladder stopping device for aerial ladder truck There is provided a ladder working limit based ladder stopping device for a vehicle equipped with a vertically and horizontally swingable and extensible ladder (or a fire engine truck), wherein a working limit of the ladder is preset on the basis of an ex... | 06/08/1976 |
