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| Number | Title | Issue Date |
| 7312849 | Substrate alignment apparatus and method, and exposure apparatus A substrate alignment apparatus which aligns and fixes a substrate on a substrate stage includes a chucking pad fixed on the substrate stage to chuck and fix the substrate, a moving unit which moves the substrate with respect to the substrate stage such that a mark ... | 12/25/2007 |
| 7162881 | Thermophoretic wand to protect front and back surfaces of an object Methods and apparatus for enabling a clean, fragile object to be transported while protecting both front and back surfaces of the object are disclosed. According to one aspect of the present invention, a thermophoretic wand that is arranged to carry an object having... | 01/16/2007 |
| 7136165 | Substrate alignment apparatus and method, and exposure apparatus A substrate alignment apparatus which aligns and fixes a substrate on a substrate stage includes a chucking pad fixed on the substrate stage to chuck and fix the substrate, a moving unit which moves the substrate with respect to the substrate stage such that a mark ... | 11/14/2006 |
| 6971270 | Method and apparatus for measuring gripping strength of a vacuum wand A method and apparatus for measuring the vacuum gripping strength of a vacuum wand or robotic arm provides a pressure gauge and a conduit extending from the pressure gauge and terminating at an opening formed in a receiving surface. A vacuum wand head is positioned ... | 12/06/2005 |
| 6439954 | Weight transferring sled toy A weight transferring sled toy for simulating a weight transfer sled used in truck and tractor pulls. The weight transferring sled toy includes a main body portion that has a main body base and a pair of tracks that extend upward from the main body base. ... | 08/27/2002 |
| 5783754 | Apparatus and method for measuring the gripping strength of a vacuum wand An apparatus for measuring the gripping strength of a wafer holder, such as a vacuum wand or an automated robotic arm, is used to periodically test wafer holders during manufacture of wafers, and thereby eliminate the damage caused to wafers by worn wafer... | 07/21/1998 |
| 4615223 | Increasing frictional resistance measuring apparatus A frictional resistance measuring apparatus having a platform (28) attached to a frame (20). A pair of tandem wheels (36) are also attached to the frame (20), the combination providing a resistance surface and a rotational drive source when placed upon th... | 10/07/1986 |
| 4596533 | Toy work vehicle and trailer assembly A toy vehicle having a rear hitching element engageable by a dynamic coupler at one end of a sled-type trailer which may be more or less loaded by a player. The coupler is attached to a spring-biased piston slidable within a box projecting from the traile... | 06/24/1986 |
| 4389810 | Metering toy for selecting a self-propelled vehicle of greatest strength A load-measuring device for a self-propelled toy truck vehicle, or the like, comprises a movable platform having a set of wheels and a friction sled mat movable on the surface upon which the vehicle is propelled. The strength of the vehicle is measured by... | 06/28/1983 |
| 4354390 | Tractor pull sled A sled for use in tractor pulling contests, and the like, comprising a frame supported on front and rear wheels, a ballast mass supported by the frame, a pan adapted for sliding frictional engagement with the ground, and an articulated linkage mechanism f... | 10/19/1982 |
| 3967496 | Tractor pull sled Disclosed herein is a device adapted to be pulled by a tractor, which device comprises an elongated frame having forward and rearward ends, wheels supporting the rearward end of the frame for travel along the ground, a mass movable on the frame between th... | 07/06/1976 |
