From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
List of patents with their respective patentees and titles.
| Identifier | ExFiles\Box 147\2\ scan0261 | |
| Date | 7th March 1940 guessed | |
| No. Patentee. Title. C. 518,113 The Bristol Aeroplane Co.Ltd., and Leslie George Frise and Ralph Ponting. Improvements in or relating to Gun-firing systems Da.{Bernard Day - Chassis Design} 518,116 Societe des Engrenages de Precision Procedes Maag. Improvements in or relating to Electro-magnetic Switching Devices for Change Gear. ------------------- | ||