Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 5279154 | Thermal mass flow sensor A vertical flow thermal mass flow sensor for a vertical flow thermal mass flow meter of a vertical flow thermal mass flow controller has a sensor tube having a gas inlet for receiving a gas to be metered. The sensor tube includes a first curved convection... | 01/18/1994 |
| 4928048 | Fast response control circuit A fast response control circuit for providing an output signal in miminum time after receiving an enabling input signal. The control circuit includes an amplifier which provides an output signal having a magnitude determined by a variable input signal whe... | 05/22/1990 |
| 4913192 | Gas flow control apparatus Gas flow control apparatus for controlling the flow of a process gas through a conduit system to a process site, for halting the flow of gas when the process is completed, and for then developing a partial vacuum in the conduit system sufficiently high to... | 04/03/1990 |
| 4858643 | Fluid flow stabilizing apparatus A fluid flow stabilizer which includes two pluralities of stabilizer units adjacent one another. Each unit includes a plurality of parallel axially extending tubules. The units are movable into different relative positions so that certain of the tubules o... | 08/22/1989 |
