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| All Patents in class 451/89 | |||||
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| Number | Date | Patentee | Title | Type | |
| 914,105 | Mar. 02, 1909 | F.P. Boland | Sand-blast machine | sand blasters | |
| 914,783 | Mar. 09, 1909 | F.P. Boland | Sand-blast machine | sand blasters | |
| 4,084,357 | Apr. 18, 1978 | R.W. Moses | Valve cleaning machine | sand blasters | |