Number | Name | Date | Kind |
---|---|---|---|
309868 | Olson | Dec 1884 | |
387448 | Richards | Aug 1888 | |
1017352 | Wagner | Feb 1912 | |
1047466 | Wagner | Dec 1912 | |
1881024 | Lang | Oct 1932 | |
2334845 | Schwartz | Nov 1943 | |
2732869 | Stearns | Jan 1956 | |
2746722 | Schneider | May 1956 | |
2777342 | Fried | Jan 1957 | |
2962066 | Deliso | Nov 1960 | |
2977828 | Strickland | Apr 1961 | |
3022686 | Rowley | Feb 1962 | |
3122947 | Cogsdill | Mar 1964 | |
3191700 | McKenna | Jun 1965 | |
3564948 | Pomernacki | Feb 1971 | |
3592555 | Mackey | Jul 1971 | |
3667768 | Stokey | Jun 1972 | |
3940214 | Waschek | Feb 1976 | |
3997279 | Porter | Dec 1976 | |
4032251 | Ribich | Jun 1977 | |
4043698 | Chelberg | Aug 1977 | |
4050841 | Hildebrandt | Sep 1977 | |
4066379 | Prohaska | Jan 1978 | |
4078621 | Dewar et al. | Mar 1978 | |
4079766 | Conley et al. | Mar 1978 | |
4086018 | Robinson et al. | Apr 1978 | |
4093395 | Luebbert | Jun 1978 | |
4095491 | Hildebrandt | Jun 1978 | |
4312610 | Burt | Jan 1982 |
Number | Date | Country |
---|---|---|
538218 | Mar 1957 | CAX |
80109 | Jan 1951 | CSX |
Entry |
---|
"Spade Drills for High Production", Butrick, American Machinist, Apr. 17, 1972. |