| Patents for National Tube Co. |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
| | 638,808 | Dec. 12, 1899 | E.F. Holinger | Vertical Piercing-Press. |
| | 742,223 | Oct. 27, 1903 | P.C. Paterson | Hot Saw |
| | 761,348 | May 31, 1904 | J.E. Bates | Chuck for Holding Sockets |
| | 762,947 | Jun. 21, 1904 | A.M. Saunders | Screw Threading Die .. |
| | 764,550 | Jul. 12, 1904 | H.R. Borie | Vanishing Thread Tap |
| | 769,709 | Sep. 13, 1904 | J.H. Nicholson | Tube Rolling Mill |
| | 771,528 | Oct. 04, 1904 | H.E. Boyd | Threading Mechanism |
 | 1,287,203 | Dec. 10, 1918 | A.M. Saunders, P. Boyd | Drill Tube Section |
 | 1,630,690 | May 31, 1927 | A. Telfer, J.P. Bosle | Gauge |
 | 1,950,912 | Mar. 13, 1934 | E.A. Aronson | Gauge |
