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| Patents for Gordon McIntosh Letson | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-286,312 | Jan. 08, 1929 | D.A. McIntosh, G.M. Letson | Derrick conveyer | hoists, winches, come-alongs | |
| 3,367,479 | Feb. 06, 1968 | G.M. Letson, R.A. Baldrey | Impact absorbing apparatus | woodworking machine material handling | |
| CA-834,556 | Feb. 17, 1970 | G.M. Letson, R.A. Baldrey | Impact absorbing conveyor roll | woodworking machine material handling | |