Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 4278203 | Antiskid traction device for vehicle wheel An antiskid traction device of the type which is engaged under a vehicle wheel to provide traction thereto when stuck in a rut. This traction device is characterized by being constructed to prevent sinking thereof into the snow or mud under the wheel, and... | 07/14/1981 |
| 4265399 | Snow chain A heavy duty anti-skid device of the type that can be folded into a compact unit for storage comprising a series of three open framed sections with each section being parallel-sided and comprised of angle iron mesh having four edges in welded assembly wit... | 05/05/1981 |
| 4261510 | Vehicle wheel traction device A device is disclosed for improving the traction of vehicle wheels, particularly for use with an automotive vehicle rendered immobile in snow or sand. A plate is provided with transverse T-shaped gripping members affixed to the plate on each surface for t... | 04/14/1981 |
| 4254907 | Portable traction track for vehicle driving wheel An improved portable traction track for a vehicle driving wheel which is characterized by a plurality of base sections flexibly connected to one another to form an elongate strip adapted to be pulled under a rotating driving wheel. Each of the base sectio... | 03/10/1981 |
| 4230269 | Traction device The traction device is adapted to be placed under the slipping wheel of a vehicle which is disabled for lack of traction as a result of the slipping wheel being unable to develop any driving torque on top of snow, ice, mud or other slippery surface. Gener... | 10/28/1980 |
| 4227562 | Road traction apparatus Vehicular road traction apparatus feeds a traction portion of an endless chain between a tire and the road surface and a recirculating portion of the chain is picked up aft of the tire and fed into a conduit which conducts it back to a point fore of the t... | 10/14/1980 |
| 4225082 | Low cost vehicle traction device employing pivotally mounted anchoring means A vehicle traction device for passenger cars and alike including a flexible belt-like traction mat with transverse corrugations on one side and substantially smooth on the other side. One end of the mat is pivotally secured to anchoring means including a ... | 09/30/1980 |
| 4223835 | Traction pad A traction pad for use with vehicle tires on slippery road surfaces, the pad having a rectangular plastic mat portion with one end provided with a wedge shape. The tire facing surface of the mat, including the wedge portion, is provided with groups of sub... | 09/23/1980 |
| 4211366 | Vehicle tire traction strip A traction strip for vehicle driving wheels including a sheet of flexible material and a plurality of equally sized metal channels which are mounted in a contiguous spaced relationship on both sides of the sheet. The channels are mounted on the sheet in a... | 07/08/1980 |
| 4210280 | Traction mat A traction mat having a plurality of pins captivated in a resilient mat, each pin having a head on each of the opposing ends, and a washer between the head and the mat. The mat provides increased traction to a vehicle stuck in snow and the like by seizing... | 07/01/1980 |
| 4133480 | Convenience anti-wheel spin device for rubber tired vehicles including a winching accessory An anti-wheel spin device for rubber tired vehicles including a pair of mattings or pads of different lengths coupled together to prevent them from propelling against the vehicle by a spinning wheel. A winching accessory is also provided for securing one ... | 01/09/1979 |
| 4133481 | Anti-skid device for vehicles A traction device comprising a mat made of molded thermo-plastic material having a generally rectangular frame, a traction area and an approach area on each side of the traction area. The traction area occupies approximately half of the length of the mat ... | 01/09/1979 |
| 4121765 | Ice mat An ice mat device for improving the traction of a wheel of an automobile on ice includes an elongated, flexible mat member of a rectangular shape, wherein a pair of elongated strap members are longitudinally embedded in the mat. A plurality of elongated r... | 10/24/1978 |
| 4061268 | Traction mat A mat useful, inter alia, to provide traction under the wheels of a vehicle comprises an open-mesh net of strands that are encased around their individual circumferences with a frictional coating that comprises a layer of binder material adhered to the st... | 12/06/1977 |
| 3998981 | Method for producing a tire-mounted anti-skid device An endless tire-mounted anti-skid belt is produced by spreading an endless fibrous mesh to the diameter of the vehicle tire on which the belt is to be mounted, impregnating the spread endless mesh with a hot-vulcanizable elastomer dissolved in a solvent, ... | 12/21/1976 |
| 3997110 | Anti-slipping accessory for traction wheel An accessory adapted to be wedged under a traction wheel of a vehicle to allow production of traction upon rotation of that wheel. This anti-slipping accessory is characterized by cleats laterally offset from each other transversely of the accessory to pr... | 12/14/1976 |
