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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7375797 | Utilities transfer system in a lithography system Techniques for transferring utilities to and from a reticle or wafer stage in a lithography system while minimizing physical disturbances that affect the stage are described. These techniques involve transferring utilities to and from the stage without making physic... | 05/20/2008 |
| 7351504 | Photomask blank substrate, photomask blank and photomask In a quadrangular photomask blank substrate with a length on each side of at least 6 inches, which has a pair of strip-like regions that extend from 2 to 10 mm inside each of a pair of opposing sides along an outer periphery of a substrate top surface, with a 2 mm e... | 04/01/2008 |
