"Everyone acquainted with the subject will recognize it as a conspicuous failure."
Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb
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| Number | Title | Issue Date |
| 4738240 | Process for cutting a diamond to provide an invisible mounting A process for cutting a diamond to realize an invisible mounting by using cuts situated below the girdle in which may be engaged the mounting. According to the invention the notches (7) have the shape of a dihedron (4) of which the two surfaces (5-6) are ... | 04/19/1988 |