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| Patents for Donald L. Billian | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,840,122 | Jun. 24, 1958 | D.L. Billian, R.V. Klikunas | Locomotive tank filling nozzle | ||
| 2,851,065 | Sep. 09, 1958 | D.L. Billian, R.V. Klikunas | Automatic tank filling nozzle | ||
| 2,860,649 | Nov. 18, 1958 | D.L. Billian | Emergency shut-off valve | ||