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| Number | Title | Issue Date |
| 6339886 | Remotely measured caliper for wellbore fluid sample taking instrument An apparatus for measuring the internal diameter of a wellbore for a wireline formation sample taking instrument, including an hydraulically actuated probe and back up shoe for selective engagement with the wall of a wellbore, an hydraulic pump and select... | 01/22/2002 |
| 5191720 | Spot welding inspecting apparatus The present invention relates to a spot welding inspecting apparatus for inspecting a weld between two metal plates which are subjected to spot welding without destroying the metal plates or weld. A pair of knife gauges having an interval therebetween lar... | 03/09/1993 |
| 4771550 | Measuring apparatus A system for removing trapped air layers is disclosed for use in a measuring apparatus such as a length measuring apparatus for measuring dimensions of a test object supported on a measuring surface. According to this invention, the measuring surface defi... | 09/20/1988 |
| 4362193 | Inflating apparatus for playballs Inflation apparatus for hollow flexible wall objects, such as playballs, in which the source of inflation gas or air is normally inoperative until the object to be inflated is moved into engagement with a gas injection needle for energizing the source of ... | 12/07/1982 |
| 4008523 | Digital electro-optical micrometer and gages This invention pertains to an electro-optical digital precision micrometer and gages wherein a precision scale is carried in a frame and is moved with the movable anvil portion of the apparatus. The precision glass scale has a determined number of lines e... | 02/22/1977 |
