| All Patents in class 408/200 |
Patents 16 -
24
of 24
      |
| Number | Date | Patentee | Title | Type |
| 1,520,382 | Dec. 23, 1924 | R.W. Workman | Boring Head | boring heads |
| 1,814,211 | Jul. 14, 1931 | J. Garbarek | Tool Holder | lathe tool holders and tool posts |
| 1,861,498 | Jun. 07, 1932 | R.L. Hibbard | Boring Head | boring heads |
| 1,939,430 | Dec. 12, 1933 | A.B. Andrews | Sampling tool for pulp or the like | papermaker |
| 2,083,418 | Jun. 08, 1937 | A.B. Andrews | Sampling tool for pulp or the like | papermaker |
| 2,320,333 | May 25, 1943 | H.C. Pierle | Gun boring tool | gunsmith |
| 2,412,937 | Dec. 24, 1946 | E.A. Allen | Boring head | boring heads |
| 2,811,875 | Nov. 05, 1957 | S.A. Cogsdill | Twist Drill Having Oil Passages Therein and Method of Construction | metalworking twist drills |
| 2,895,356 | Jul. 21, 1959 | S.A. Cogsdill | Deburring Tool | deburring tools |
