| All Patents of Type: multiple spindle drilling heads |
Patents 1 -
15
of 18
      |
| Number | Date | Patentee | Title | Type |
| 540,630 | Jun. 11, 1895 | W.P. Brett | Drilling Machine | multiple spindle drilling heads |
| 1,079,023 | Nov. 18, 1913 | A.H. Reher | Multiple Spindle Drill Head | multiple spindle drilling heads |
| 1,083,696 | Jan. 06, 1914 | A.T. Nelson | Adjustable Multiple Spindle Head for Drill Presses | multiple spindle drilling heads |
| 1,146,768 | Jul. 13, 1915 | E.W. Cleveland | Multiple Spindle Drill Head | multiple spindle drilling heads |
| 1,258,089 | Mar. 05, 1918 | E.P. Bullard, Jr., W.N. Stevens | Automatic Machine-Tool | vertical boring mills |
| 1,470,735 | Oct. 16, 1923 | J.A. Wilding, G. Hey | Multiple Spindle Drill Head | multiple spindle drilling heads |
| 1,525,091 | Feb. 03, 1925 | A.C. Savidge | Multiple Drill Attachment | multiple spindle drilling heads |
| 1,526,282 | Feb. 10, 1925 | S.C. Smith, G. Hey | Multiple Spindle Drill Head | multiple spindle drilling heads |
| 2,213,579 | Sep. 03, 1940 | G.W. Emrick | Variable multiple head | multiple spindle drilling heads |
| 2,349,240 | May 23, 1944 | R.B. Aiman | Adjustable Multiple Spindle Drill Head | multiple spindle drilling heads |
| 2,452,709 | Nov. 02, 1948 | R.B. Aiman | Lubricating System for Adjustable Multiple Spindle Drill Head | metalworking machine lubrication |
| GB-619,579 | Mar. 11, 1949 | . | Improvements in or relating to a multiple spindle driving mechanism | multiple spindle drilling heads |
| CA-459,557 | Sep. 06, 1949 | F.G. Zagar | Multiple spindle driving mechanism | multiple spindle drilling heads |
| 2,522,736 | Sep. 19, 1950 | F.G. Zagar | Parallel motion multiple spindle head | multiple spindle drilling heads |
| CA-473,189 | Apr. 24, 1951 | F.G. Zagar | Parallel motion multiple spindle heads | multiple spindle drilling heads |
