| Patents for Automotive Maintenance Machinery Co. |
Patents 1 -
15
of 19
      |
| Number | Date | Patentee | Title | Type |
| 1,522,720 | Jan. 13, 1925 | H.C. Heon | Cylinder-grinding tool | cylinder maintenance |
| 1,774,711 | Sep. 02, 1930 | H.C. Heon | Cylinder-grinding tool | automotive tools |
| 1,925,709 | Sep. 05, 1933 | H.W. Zimmerman | Cylinder grinding tool | automotive tools |
| 1,957,485 | May 08, 1934 | H.W. Zimmerman | Cylinder grinding tool adjusting mechanism | automotive tools |
| 1,959,891 | May 22, 1934 | H.W. Zimmerman | Bearing hone | automotive tools |
| 1,987,457 | Jan. 08, 1935 | H.W. Zimmerman | Cylinder grinding tool | automotive tools |
| 2,002,971 | May 28, 1935 | H.W. Zimmerman | Reamer sharpener | reamers |
| 2,007,490 | Jul. 09, 1935 | H.W. Zimmerman | Ring filing structure | automotive tools |
| 2,013,374 | Sep. 03, 1935 | H.W. Zimmerman | Connecting rod alignment gauge | automotive tools |
| 2,047,607 | Jul. 14, 1936 | H.W. Zimmerman | Gauging Device | measurement gauges |
| D105,629 | Aug. 10, 1937 | H.W. Zimmerman | Design for a wrench | torque wrenches |
| 2,129,485 | Sep. 06, 1938 | H.W. Zimmerman | Boring machine | boring and turning machines |
| 2,155,072 | Apr. 18, 1939 | H.W. Zimmerman | Machine for sizing and finishing bores | boring and turning machines |
| 2,190,967 | Feb. 20, 1940 | H.W. Zimmerman | Torque measuring wrench | torque wrenches |
| 2,211,401 | Aug. 13, 1940 | H.W. Zimmerman | Torque measuring wrench | torque wrenches |
