| All Patents in class 73/105 | 
| Patents 1 - 
					11
					of 11 
       | 
| Number | Date | Patentee | Title | Type | 
| 773,983 | Nov. 01, 1904 | W.H. Reisner | Indicating Surface Gage | dial indicator gauges | 
| 1,891,777 | Dec. 20, 1932 | A.G. Plimmer | Grinding Machine | grinding machines | 
| 2,020,548 | Nov. 12, 1935 | R.E. Harrison | Testing Apparatus for Surface Finish | grinding machines | 
| 2,404,143 | Jul. 16, 1946 | R.E. Reason | Apparatus for Measuring or Indicating the Roughness or Undulations of Surfaces | measurement gauges | 
| 2,460,726 | Feb. 01, 1949 | J.P. Arndt, Jr. | Surface Roughness Measuring Device | measurement gauges | 
| 2,620,655 | Dec. 09, 1952 | D.E. Priest | Instrument for Recording or Measuring the Size and Shape of Surface Irregularities | measurement gauges | 
| 2,789,429 | Apr. 23, 1957 | J.B. Bidwell | Surface Gage Extension Probe | measurement gauges | 
| 3,049,002 | Aug. 14, 1962 | H. Hediger | Device for measuring the Roughness of Surfaces | measurement gauges | 
| 4,106,333 | Aug. 15, 1978 | H. Mushardt, E. Saljé | Method and Apparatusfor Examining the Roughness of Surfaces | special purpose gauges | 
| 4,133,204 | Jan. 09, 1979 | J. Mittleman | Roughness Diagnostic Tool | special purpose gauges | 
| 4,776,212 | Oct. 11, 1988 | E.F. Cote, M.H. Miller, F.G. Parsons | Pocket Surface Roughness Gage | measurement gauges |