| All Patents in class 408/72R |
Patents 16 -
30
of 30
      |
| Number | Date | Patentee | Title | Type |
| 1,782,284 | Nov. 18, 1930 | M. Betancourt | Bit Gauge with Level | drill depth stops |
| 1,820,056 | Aug. 25, 1931 | I. Drowns | Boring Tool Holder | drilling and boring tool holders |
| 1,937,659 | Dec. 05, 1933 | H.M. Lucas | Wayguard and Platform Construction for Machine Tools | metalworking machine mechanisms |
| 1,942,092 | Jan. 02, 1934 | K.F. Gallimore | Remote Control for Movable Members of Machine Tools | horizontal boring mill attachments |
| 2,196,827 | Apr. 09, 1940 | F.P. Healy | Tool guide for boring machines | vertical boring mills |
| D139,796 | Dec. 19, 1944 | G.A. Terry | Drilling Attachment | drill accessories |
| D139,797 | Dec. 19, 1944 | G.A. Terry | Drilling Attachment | drill accessories |
| 2,575,945 | Nov. 20, 1951 | C.B. De Vlieg | Machine tool positioning mechanism | metalworking machine mechanisms |
| 2,645,139 | Jul. 14, 1953 | A.F. Beauloye, H. Beauloye, Jr., M. Beauloye | Portable Boring Mill | vertical boring mills |
| 3,985,462 | Oct. 12, 1976 | T.P. Didato | V Block Center Finder | V blocks |
| 4,461,603 | Jul. 24, 1984 | R.J. Newman, S.L. Collier, G.R. De Noma, G. Klee | Drilling fixture | drill and tap guides |
| 4,492,498 | Jan. 08, 1985 | E.M. Kaufman | Drill bit jig | wood drilling and boring |
| 4,589,806 | May 20, 1986 | J.W. Rotta, Jr. | Tap and drill guide | drill and tap guides |
| 4,990,037 | Feb. 05, 1991 | D.S. Strait | Portable Boring Machine | portable metal boring and drilling machines |
| 5,056,966 | Oct. 15, 1991 | R.C. Lee | Drilling jig | |
