Heavily faded document with a purple 'Patents Derby' date stamp.
| Identifier | ExFiles\Box 31\4\ Scan079 | |
| Date | 16th September 1931 | |
| The main body of the document is too faded to be legible. Text from the purple stamp: ROLLS-ROYCE LTD. PATENTS SITES 16 SEP 31 DERBY. | ||
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).