| All Patents in class 192/89.27 | 
| Patents 1 - 
					6
					of 6 
       | 
| Number | Date | Patentee | Title | Type | 
| 144,178 | Oct. 28, 1873 | C.V. Woerd | Watchmakers' Lathes | watchmakers lathes | 
| 915,298 | Mar. 16, 1909 | W.G. Klemm | Grinding-machine or the like | bench or pedestal grinders | 
| 1,043,406 | Nov. 05, 1912 | R.J. Denio | Clutch | automobiles | 
| 1,437,319 | Nov. 28, 1922 | A.B. Landis | Automobile clutch | motor vehicles | 
| 1,709,339 | Apr. 16, 1929 | F.B. Cockburn | Clutch Mechanism for Lathe Apron Transmission | metal lathe mechanisms | 
| 3,005,527 | Oct. 24, 1961 | A.I. Zagar | Positive drive tapping attachments | tapping machines |