Lantern slides and films relating to an application by E. & L. Dreyer to revoke patent 91258, 'Improvements in or relating to devices for spreading granular or powdery material'.
- Made:
- 1875-1944
- part of archive:
- Papers of patent agent and engineer Sir Dugald Clerk, relating to gas engines and patent investigations
- maker:
- Marks & Clerk
Details
- Extent:
-
c. 100 slides and 3 reals of film
- Identifier:
- MAC/3
- Access:
- Open Access
- copyright: