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| Patents for Ross E. Langill | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,637,907 | Aug. 02, 1927 | R.E. Langill, W.B. Grueter | Sawmill dog | ||
| 1,769,927 | Jul. 08, 1930 | W.B. Grueter, R.E. Langill | Mechanism for controlling the press rolls or like elements of edgers | ||
| 1,838,948 | Dec. 29, 1931 | W.B. Grueter, R.E. Langill | Sawmill dog | ||
| 1,861,867 | Jun. 07, 1932 | R.E. Langill, W.B. Grueter | Sawmill dog | ||
| 1,866,937 | Jul. 12, 1932 | R.E. Langill | Sawmill dog | ||
| 1,944,287 | Jan. 23, 1934 | R.E. Langill | Sawmill dog | ||