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Patents for Bernard Stephenson | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | GB-256,811 | Aug. 19, 1926 | B. Stephenson | Improvements relating to feed water heaters | |
![]() | GB-273,113 | Jun. 30, 1927 | B. Stephenson | Improvements relating to calorifiers |