| All Patents in class 81/3.4 |
Patents 16 -
25
of 25
      |
| Number | Date | Patentee | Title | Type |
| 1,662,936 | Mar. 20, 1928 | R. Phillipp | Chamfering Device | pipe deburring tools |
| 1,814,014 | Jul. 14, 1931 | S. Vitali | Gripping Tool For Jars | jar wrenches |
| 1,896,437 | Feb. 07, 1933 | A.B. Allen | Pipe Wrench | alligator wrenches |
| 1,919,708 | Jul. 25, 1933 | W.J. Adams | Jar Cap Wrench | jar wrenches |
| 1,919,866 | Jul. 25, 1933 | C.A. Schacht | Fruit Jar Opener | jar wrenches |
| D159,533 | Aug. 01, 1950 | J. Przybyla | Bar Tool | jar wrenches |
| 2,810,311 | Oct. 22, 1957 | W.D. Smith | Threaded-Closure-Turning Tool | jar wrenches |
| 3,048,068 | Aug. 07, 1962 | L.L. Griffiths | Closure Remover Device | |
| 3,600,982 | Aug. 24, 1971 | J.G. Tholen | Jar Cover Remover | jar wrenches |
| 5,425,289 | Jun. 20, 1995 | D.J. Iwinski | Bung Tool | |
