| Patents for John N. Petre |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 2,206,364 | Jul. 02, 1940 | J.N. Petre | Screw Driver Attachment | screwdriver mechanisms |
| 2,476,762 | Jul. 19, 1949 | J.O. Olsen, J.N. Petre | Chuck | screwdriver mechanisms |
| 2,487,174 | Nov. 08, 1949 | J.N. Petre | Tool Kit | wrench set holders |
| CA-482,193 | Apr. 01, 1952 | J.O. Olsen, J.N. Petre | Mandrins | |
| 2,596,594 | May 13, 1952 | J.N. Petre | Chuck Feature of Tools of the Detachably Connected Shank and Handle Type | screwdriver mechanisms |
| 2,675,742 | Apr. 20, 1954 | J.N. Petre | Method for Forming Fluted Bits upon an End of a Shank of a Screw Driver | screwdriver blades |
| 2,675,744 | Apr. 20, 1954 | J.N. Petre | Machine for Forming Screw Driver Bits of the Fluted Type | screwdriver blades |
