Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 6953395 | Ventilation system for underground structure A ventilation system for an underground structure which can internally supply fresh outdoor air by individually sucking and discharging air through fans of underground shafts in the underground structure such as an underground parking lot, underground warehouse, sub... | 10/11/2005 |
| 6669552 | Telescopic ventline An apparatus and method for ventilating tunnels and other confined spaces. The apparatus includes a telescopic ventline assembly. The telescopic ventline assembly includes a plurality of tubes wherein each inner tube or first intermediate tube is slidably... | 12/30/2003 |
| 5188427 | Twin scrubber and air diffuser for a continuous miner and method of ventilation A continuous mining machine is provided with dual ductwork having reversible fans. The ductwork extends longitudinally along each side of the continuous mining machine. Each fan is positioned in a duct at the rear end of the frame of the mining machine. A... | 02/23/1993 |
| 4362092 | Auxiliary ventilation system for underground sites An auxiliary ventilation system for an underground site comprises an air box through which extend first and second chambers each having inlet and outlet ports and being in communication with one another. Flap members are mounted one in each chamber to be ... | 12/07/1982 |
| 4249462 | Method and apparatus for preventing ice formation at the entrance portal of a mine To prevent the formation of ice at the inlet portal of a mine and to heat air during the winter season, air is heated and forced into the mine shaft near the entrance portal at a pressure greater than atmospheric.... | 02/10/1981 |
| 4200036 | Ventilation system for automated mining machines A mine ventilation system and method are provided for continuously supplying fresher air to an automated mining machine located in a mine heading. A blower attached to a mining machine operates to suck fresher air into the heading from a tunnel with throu... | 04/29/1980 |
