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| Patents for John Arthur Tatem | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,947,268 | Aug. 02, 1960 | R.D. Northcote, J.A. Tatem | Boilers | ||
| GB-856,751 | Dec. 21, 1960 | R.D. Northcote, J.A. Tatem | Improvements in Boilers | ||
| GB-856,879 | Dec. 21, 1960 | R.D. Northcote, J.A. Tatem | Improvements in Boilers | ||
| CA-616,380 | Mar. 14, 1961 | J.A. Tatem, R.D. Northcote | Boilers | ||