| 2388751 | Diamond polishing device | |||
| 2137405 | Gem cutting machine | |||
| 2096422 | Method of and apparatus for working material | |||
| 1958021 | Fixture | |||
| 1894010 | Work-holding means for gauges | |||
| 1520948 | Machine for grinding precious stones | |||
| 1461149 | Apparatus for cutting diamonds | |||
| 1329371 | Means for holding diamonds during the polishing operation | |||
| 1075321 | N/A | |||
| 0925016 | N/A | |||
| 0753992 | N/A | |||
| 0740902 | N/A | |||
| 0698521 | N/A | |||
| 0677613 | N/A | |||
| 0523504 | N/A | |||
| 0479452 | N/A | |||
| 0457866 | N/A |
| GB191113675A |