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| Patents for M. R. Spayd | |||||
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| Number | Date | Patentee | Title | Type | |
| 977,541 | Dec. 06, 1910 | H.W. Oster | Die-stock | taps and dies | |
| 1,139,063 | May 11, 1915 | H.W. Oster | Lathe attachment for stamping markings | ||
| 1,159,790 | Nov. 09, 1915 | H.W. Oster | Oiling mechanism for machine-tools | metalworking machine lubrication | |