Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 5153668 | Optical inspection apparatus and illumination system particularly useful therein Optical inspection apparatus includes an illumination system illuminating an area of the workpiece surface with a sky of illumination which is, with respect to each point in the illuminated area, substantially circularly symmetric over a solid angle aroun... | 10/06/1992 |
| 5056765 | Immobilizing device particularly useful during processing or testing flat workpieces An immobilizing device particularly useful during processing or testing flat workpieces includes an air-cushion unit carried at the lower end of a carrier member and having an annular skirt defining with the workpiece, an air-cushion chamber effective, wh... | 10/15/1991 |
| 5008743 | Telecentric imaging system optical inspection machine using the same and method for correcting optical distortion produced thereby A telecentric imaging system includes a Fresnel lens mountable in proximity to an object to be imaged, a source of light for illuminating the object, and an aperture stop located at least in the telecentric imaging system is incorporated into an optical i... | 04/16/1991 |
| 4758888 | Method of and means for inspecting workpieces traveling along a production line Inspection of workpieces traveling along a production line includes on-line inspection of the workpieces at an upstream inspection station to detect possible flaws without interrupting the progression of workpieces along the production line. Possible flaw... | 07/19/1988 |
