| All Patents in class 29/221 |
Patents 1 -
10
of 26
      |
| Picture | Number | Date | Patentee | Title |
 | 982,539 | Jan. 24, 1911 | W.H. Shimpf | Spring Holding Device For Valves |
 | 1,044,517 | Nov. 19, 1912 | B.C. Hallgren | Valve Lifting Device |
 | 1,045,321 | Nov. 26, 1912 | P.F. Pilliner | Valve Spring Compressor |
 | 1,105,096 | Jul. 28, 1914 | S.C. North | Tool for Removing Engine Valves |
 | 1,234,967 | Jul. 31, 1917 | C.O. Throp | Valve Removing Tool |
 | 1,330,542 | Feb. 10, 1920 | H.W. Kulp | Valve Spring Lifter |
 | 1,333,966 | Mar. 16, 1920 | W.B. Fay | Lifting Jack |
 | 1,359,814 | Nov. 23, 1920 | M.C. Dellinger, H.W. Kulp | Valve-spring lifter |
 | 1,444,729 | Feb. 06, 1923 | D.E. Carlson | Valve Spring Lifter |
 | 1,447,447 | Mar. 06, 1923 | J.E. Wainwright | Valve Lifting Device |
