| All Patents in class 29/221 |
Patents 16 -
26
of 26
      |
| Number | Date | Patentee | Title | Type |
| 1,713,761 | May 21, 1929 | M.C. Dellinger, H.W. Kulp | Collapsible Valve Spring Lifter Lock | valve spring tools |
| 1,713,762 | May 21, 1929 | M.C. Dellinger, H.W. Kulp | Valve Spring Compressor | valve spring tools |
| 1,713,763 | May 21, 1929 | H.W. Kulp | Valve Spring Lifter and Compressor | valve spring tools |
| 1,770,899 | Jul. 22, 1930 | J.A. Anderson | Valve Spring Lifter | valve spring tools |
| 1,772,428 | Aug. 05, 1930 | J.J. Palotce | Pliers, Tongs, or the Like | combination tools |
| 1,776,159 | Sep. 16, 1930 | M.C. Dellinger, H.W. Kulp | Shield | valve spring tools |
| 1,815,980 | Jul. 28, 1931 | M.C. Dellinger, H.W. Kulp | Valve Spring Lifter | valve spring tools |
| 1,879,330 | Sep. 27, 1932 | M.C. Dellinger, H.W. Kulp | Valve Spring Lifter | valve spring tools |
| 1,924,246 | Aug. 29, 1933 | M.C. Dellinger, H.W. Kulp | Spring Compressor | valve spring tools |
| 2,064,264 | Dec. 15, 1936 | H.W. Kulp | Valve Spring Lifter | valve spring tools |
| 2,264,391 | Dec. 02, 1941 | J.M. MacLeod | Spring Applying and Removing Implement | brake adjusting tools |
