"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7169022 | Method and apparatus for creating a groove in a collector ring of an electrical device A method and apparatus for creating a groove in the surface of a collector ring for use in an electrical device. The method and apparatus can be used to create a new groove in the surface of a collector ring having none, or can be used to enhance or re-form an exist... | 01/30/2007 |
| 7121932 | Portable drill sharpener A portable drill sharpener includes a casing, a sand-wheel, a positioning device, a first grinding unit and a second grinding unit, a holding member for positioning a drill to be ground, a first adjustment unit and a second adjustment unit respectively connected to ... | 10/17/2006 |
| 6997175 | Portable apparatus for working, shaping and polishing stone and other hard materials A wheeled trolley carries various tools across an object to be worked. A track attaches directly to the work and simultaneously isolates the tool from the work. A standard connection to the trolley readily accommodates a variety of diverse tools, using a keyway or t... | 02/14/2006 |
| 6942551 | Method for forming a cutting edge along an edge portion of a blade stock A method for forming a cutting edge along an edge portion of a blade stock, wherein the method includes moving the blade stock with respect to a first cutting element rotating about a first rotational axis, the first rotational axis forming one of an acute angle and... | 09/13/2005 |
| 6884154 | Method for apparatus for polishing outer peripheral chamfered part of wafer In a process for polishing the chamfered peripheral part of a wafer using a polishing cloth while supplying a polishing slurry in order to improve productivity of the process by reducing a polishing time, at least two steps of polishing processes are performed in se... | 04/26/2005 |
| 6679766 | Diamond sleeve honing tool A honing tool assembly adapted to be chucked in a honing machine for reciprocation and rotation, the assembly comprising a diamond-plated tool for honing cylindrical bores in a workpiece, the diamond-plated tool having a spiral pattern on a cylindrical ou... | 01/20/2004 |
| 6652367 | Drill bit grinding device A grinding device includes a rotary grinding wheel having an annular grinding surface, a first grinding seat located in front of the grinding wheel, a sleeve disposed rotatably within a through hole in the first grinding seat, an abrasion measuring device... | 11/25/2003 |
| 6561882 | Grinding method and numerically controlled grinding machine A circular or non-circular workpiece is ground in a plurality of grinding steps, including a final finish grinding step. A grinding wheel is caused to effect profile generation movement in synchronism with rotation of the workpiece and in accordance with ... | 05/13/2003 |
| 6544105 | Control device to implement a grinding process for a knife shaft The present invention relates to a control device to grind a knife shaft used in a machine intended for cutting sheets of materials into strips, for example sheets of paper, plastic, plates of photosensitive film or any other material having the form of t... | 04/08/2003 |
| 6500052 | Method of polishing a ceramic substrate The circumferential edge portion of a ductile rotating body containing abrasive grains is used to polish the surface of a ceramic substrate. The angle θ formed between the polishing direction D0 of the ceramic substrate and the rotating direct... | 12/31/2002 |
| 6450865 | Non-contact support for cylindrical machining A support for supporting a work piece to be machined is provided. The support is for use in a machine adapted to receive fluid from a fluid source. The machine includes a tool for removing material from the work piece. The support includes a body defining... | 09/17/2002 |
| 6422930 | Apparatus for removing deposited film An edge face of a deposited film at an edge portion of a device wafer having the deposited film formed on a substrate is polished at a substantially right angle so as to prevent the deposited film from peeling-off and dusting. A forming body having a sect... | 07/23/2002 |
| 6394892 | Device for machining optical workpieces A very versatile device is proposed for high-precision machining of optical workpieces, in particular optical lenses, which comprises a horizontally displaceable gantry with at least one vertically displaceable tool spindle and a yoke with workpiece holdi... | 05/28/2002 |
| 5718614 | Control apparatus for grinder Downfeed apparatus in a grinder controlling the grinding wheel down in fast, medium and slow speeds, and up in fast speed. It is fed down continuously in successive passes throughout the grinding operation, and at the end of the grinding, the grinding whe... | 02/17/1998 |
| 5577954 | Grinding apparatus of welded residue on seam of rail head A grinding apparatus of a welded residue on a seam of a rail head portion including a rail, a machine table capable of moving forward and backward along the rail, an apparatus base erected on a distal end side of the machine table, a first support disk bo... | 11/26/1996 |
| 4941294 | Grinding machine for belt materials The disclosure relates to a grinding machine which, in the production of toothed belts, grinds the back surface of a molded and vulcanized cylindrical belt material (also called a slab) to finish the belt material thickness to the specified dimension befo... | 07/17/1990 |
| 4625461 | Method and apparatus for positioning work supporting units in grinding machines The work supporting unit or units on the stationary or reciprocable work supporting table of a plain grinding machine are adjustable with reference to the table by one of the existing numerically controlled drives, such as the drive which reciprocates the... | 12/02/1986 |
| 4524544 | Machine for backing-off and/or grinding drifting spindles provided with teeth The machine comprises a sliding table (4) and a support (5,6) mounted on a transverse slide (1). The grinding spindle (7) is mounted on the support (5,6) by way of slide (14) which can be oriented by the slide (14) whereof the sliding plane of the slide i... | 06/25/1985 |
| 4501092 | Automatic grinding The invention is concerned with performing grinding operations on a workpiece at predetermined locations along its length and is described in connection with a machine for sharpening broaches in which a broach to be sharpened is mounted on a fixed bed, th... | 02/26/1985 |
| 4226053 | Grinding apparatus A grinding apparatus and method in which at least two grinding wheels are coaxially and rotatably supported on a common spindle and are juxtaposed with a worktable for a workpiece. A pulse motor on either the worktable or the spindle displaces the wheels ... | 10/07/1980 |