The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 7189333 | End effectors and methods for manufacturing end effectors with contact elements to condition polishing pads used in polishing micro-device workpieces End effectors, apparatuses including end effectors for conditioning planarizing pads, and methods for manufacturing end effectors with contact elements to condition planarizing pads used in polishing micro-device workpieces are disclosed herein. In one embodiment, a... | 03/13/2007 |
| 4322917 | Double-head automatic grinding machine A double-head automatic grinding machine which comprises a machine base, a work table supported on the base for movement in the longitudinal direction of the base and supporting a main shaft support block and an opposing tail stock for pinching a workpiec... | 04/06/1982 |
| 4271637 | Surface grinding machine A surface grinding machine is provided which comprises a head, a grinding wheel supported by the head, and a reciprocable bench for receiving and supporting a work piece. A toothed belt has opposite ends thereof fixed to the bench for effecting reciprocat... | 06/09/1981 |
| 3994100 | Multi-station grinding machine with pivoted grinding elements A multi-station grinding machine having an index table carrying a plurality of work tables rotatable with respect thereto with means for oscillating the index table while simultaneously rotating a work table whereby a workpiece at a grinding station is ca... | 11/30/1976 |