| All Patents in class 408/116 |
Patents 1 -
15
of 18
      |
| Number | Date | Patentee | Title | Type |
| 341,378 | May 04, 1886 | W.E. Gwyer | Spirit Level for Boring Bits | levels |
| 757,494 | Apr. 19, 1904 | W. Pohlman | Expansion Boring Tool | boring heads |
| 1,046,740 | Dec. 10, 1912 | E.E. Davis | Boring-tool | boring heads |
| 1,062,225 | May 20, 1913 | C.J. Crowley | Tool Holder | drilling and boring tool holders |
| 1,144,795 | Jun. 29, 1915 | E.C. Schmelzkopf | Boring Bar | boring bars |
| 1,237,185 | Aug. 14, 1917 | A.L. Ewen | Tool Holder | drilling and boring tool holders |
| 1,278,570 | Sep. 10, 1918 | G.C. Beck | Boring-tool | boring bars |
| 1,305,872 | Jun. 03, 1919 | B. Bollie | Micrometer Drilling Gage | special purpose gauges |
| 1,486,968 | Mar. 18, 1924 | H.E. Kempton | Precision Device for Boring Machines and the Like | horizontal boring mill attachments |
| 1,924,735 | Aug. 29, 1933 | R.R. Finn, E.T. Bysshe | Means for Holding Chasers | tap and die holders |
| 1,988,378 | Jan. 15, 1935 | A.I. Dunn | Boring Head and Gauge for Cylinder Reboring Machines | boring heads |
| 2,066,389 | Jan. 05, 1937 | R.G. Anderson, J.Y. Blazek | Tool setting means | vehicle mechanic |
| 2,105,757 | Jan. 18, 1938 | B.F. Rosenberg | Boring Tool | drilling and boring tool holders |
| 2,204,855 | Jun. 18, 1940 | F.P. Healy | Boring head | boring heads |
| 2,459,416 | Jan. 18, 1949 | A.H. Davis | Adapter for boring bars | boring bars |
