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 |
| 7314081 | Pumping from two levels of a pool of production fluid, and one way valve therefore A method of pumping upper production fluid from an upper level of an underground pool of production fluid and pumping lower production fluid having a higher concentration of sand from a lower level during a single pump cycle comprises providing a dual action recipro... | 01/01/2008 |
| 7100753 | Torque converter clutch apply valve A replacement torque converter clutch (TCC) apply valve for regulating the application of the torque converter clutch within an automatic transmission. The present TCC apply valve includes a valve piston having an expandable seal located at the primary wear location... | 09/05/2006 |
| 4889468 | Submerged type pump There is disclosed a submerged type pump which is vertically seated on the seating face arranged on the bottom of the fluid lifting column and is comprised of a motor section and a pump section with a casing in which the treating fluid may pass, wherein a... | 12/26/1989 |
| 4403922 | Seal gland improvements for hydraulically actuated downhole pumps An improved seal assembly for sealing the annulus between a free-type downhole hydraulically actuated pump and the pump cavity within which the pump is telescopingly received downhole in a borehole. A connector body is affixed to the upper end of the pump... | 09/13/1983 |
| 4268227 | Downhole, hydraulically-actuated pump and cavity having closed power fluid flow A downhole, hydraulically-actuated pump of the free type which is sealingly received within a cavity in such a manner that a plurality of spaced-apart annular chambers are formed. The chambers are used in conjunction with other passageways to control flow... | 05/19/1981 |
