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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7266873 | Throw-away burnishing tool for outside diameter and for inside diameter A throw-away burnishing tool for an outside diameter includes: a tool holder having a rectilinear I-shaped portion and a protrusion portion; a hard material tip detachably attached to a tip holder; a holder pin connected to the tip holder and accommodated in the pro... | 09/11/2007 |
| 7118313 | Cutting die head A cutting die head that can be set and/or reset without an external mechanism. To this end, the die head includes a die body including a plurality of radially adjustable blocks, each block having a cutter mounted thereon and a radially outwardly facing cam surface. ... | 10/10/2006 |
| 4613260 | Thread cutting die head for power driven threading machines An annular thread cutting die head for a power driven threading machine is comprised of an annular support plate supporting a plurality of radially displacable thread cutting dies spaced apart about the axis of the die head, and an annular cam plate assem... | 09/23/1986 |
| 4581783 | Base construction for threading machines A base for supporting a rotatable spindle shaft and chuck assembly of a motor driven threading machine for rotation about a spindle axis is comprised of axially spaced apart upright support members transverse to the spindle axis and rigidly interconnected... | 04/15/1986 |
| 4132495 | Die head with workpiece actuated release A die head has replaceable radially slidable threading dies moved by a bushing with cams. As the workpiece is threaded to the desired length, its end contacts cam surfaces which move a sensor bolt and a control pin to disengage the bushing from a locked p... | 01/02/1979 |
