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United States Utility Patents
4,577,490 - 4,577,499
Previous 10 Next 10
| Number | | Title |
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4,577,490 |
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Detecting leaks |
|
4,577,491 |
|
Method for determining the stability of foam |
|
4,577,492 |
|
Analytical method and apparatus |
|
4,577,493 |
|
Device for performing micromechanical measurements of the surface of test objects |
|
4,577,494 |
|
Apparatus and method for measuring the wear of railroad rail |
|
4,577,495 |
|
Apparatus for shielding and protecting an air flow rate meter disposed in the intake tube of an internal combustion engine from air column fluctuations |
|
4,577,496 |
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Transducer and holder therefor for ultrasonic acoustic tachometer |
|
4,577,497 |
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Dynamometers |
|
4,577,498 |
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Double multiple change-over valve, for controlling the operation of a water treatment plant |
|
4,577,499 |
|
Slope-speed sensor for seam welding apparatus |
For U.S. patent law, rules, and procedures see MPEP.
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