Did You Know...
...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 |
| 7048031 | Apparatus for casting dental prosthesis A new apparatus for casting dental prosthesis has been proposed, comprising a ring-placing section onto which plural rings are to be placed, a crucible holder for holding plural cylindrical crucibles, a burning unit with a furnace, a casting unit and a conveyer for ... | 05/23/2006 |
| 6488074 | Apparatus for casting dental prosthesis The present invention proposes an apparatus for casting dental prosthesis designed to save labor and costly malformations. In a form of the invention, a first arm mechanism 20 for conveying a ring and a second arm mechanism 30 for conveying a crucible are... | 12/03/2002 |
| 6441345 | Wax spatula apparatus An electrically-heated wax spatula apparatus for use in molding and preparing wax models for investment casting in the field of dental prostheses and the field of metal work based on casting, and more particularly a wax spatula apparatus wherein the tempe... | 08/27/2002 |
| 6386265 | Method of and apparatus for casting dental prosthesis While rotating a chamber 10 with a crucible 18 for heating ingots 28 of metal and a mold 23 for receiving molten metal from the crucible 18 enclosed therein from a normal position to a reversed position, when an arrival of the chamber 10 at a preset refer... | 05/14/2002 |
