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).
Correspondence for a piston patent involving multiple parties.
| Identifier | ExFiles\Box 147\2\ scan0034 | |
| Date | 6th April 1939 guessed | |
| 1247 All correspondence re. Patent for Pistons with Wellworthy, Walford & Hardman Brown and Claremont Haynes - file 1256. | ||