- J H Dalmeyer Ltd., 1863-1945 (198028, & 19858)
Photographic lens manufacturer based in Neasden and Willesden in the 20th century
- General Chemical & Pharmaceutical Co., 1919 – 1982 (GCP) Manufacturers of laboratory chemicals based in Willesden and then Sudbury
- Trobridge, Ernest J , Architect 1908-31 (19794)
Plans, drawings, correspondence and accounts for houses built in Kingsbury and elsewhere.