- O'Driscoll, William Cyril2
- S. Maw & Sons, London2
- S.S. White, MFG, Company2
- William H. Armstrong & Company, Indianapolis, Indiana2
- A. Luer of Paris1
- A.S. Aloe & Co. Schwartze, Heimann Hugo Rudolf 1837-19101
- A.S. Aloe Co., Germany1
- AMP Inc.1
- AMP Inc., Harrisburg, Pennsylvania1
- Aimar, G.W.1
- Alcan1
- Alford, W. D.1
- Allen Bros. 17 Cornhill, Boston1
- Allport, Frank 1856-19351
- Allsbrook, Nina M.1
- American Cancer Society1
- American Cystoscope Makers, Inc., New York, New York1
- American Optical, Inc.1
- Andrew A. Kroeg Pharmacist, Charleston, South Carolina1
- Baldwin, Lina-Hamilton1