| All Patents in class 408/83 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 124,230 | Mar. 05, 1872 | C.H. Thompson | Improvement in machines for cutting square mortises | mortising machines |
| 1,868,440 | Jul. 19, 1932 | E.A. Arp | Boring machine and method | automotive tools |
| 1,954,034 | Apr. 10, 1934 | E.A. Arp | Equalizing boring guide | automotive tools |
| 2,189,604 | Feb. 06, 1940 | F.P. Healy | Boring bar guiding mechanism | boring bars |
| 2,196,827 | Apr. 09, 1940 | F.P. Healy | Tool guide for boring machines | vertical boring mills |
| 2,207,861 | Jul. 16, 1940 | F.P. Healy | Boring bar guiding mechanism | boring bars |
| 2,273,258 | Feb. 17, 1942 | W.L. Groene | Boring Tool Holder | drilling and boring tool holders |
| 2,416,996 | Mar. 04, 1947 | E.A. Allen, F.P. Healy | Boring bar guiding mechanism | vertical boring mills |
| 3,099,174 | Jul. 30, 1963 | S.A. Cogsdill | Countersinking Tool | metalworking countersinks |
| 3,348,434 | Oct. 24, 1967 | H.R. Plummer | Boring Bar Assembly for Deep Hole Boring | boring bars |
| 4,824,296 | Apr. 25, 1989 | D.S. Strait | Bearing Arrangement for a Rotatable Turning Bar | portable turning tools |
