- Brewer & Co. (Inc.)1
- Brockton Products Co., Brockton, N. Y.1
- Byron Herb Co.1
- Charles F. Leavitt, trading as Leavitt Bros., Pine Point, Me.1
- Chester C. Farmer, Boothbay, Me.1
- Chief Sales Co.1
- Clarence A. Powers and Edward Edmunds, jr., copartners, trading as C. A. Powers & Co., Fort Fairfield, Me.1
- Clematis Laboratories1
- Craig-Grandell Mfg. Co. (Inc.)1
- D. D. D. Co.1
- D. Watson & Co.1
- Dairy Association Co., Inc.1
- Davis Canning Co.1
- Davis-Cleaver Produce Co.1
- Doten Grain Co., Portland, Me.1
- Dr. A. C. Daniels, Inc.1
- Dr. J. O. Lambert, Ltd.1
- Dr. N. A. Sirois, Manchester, N. H.1
- E. & F. G. Campbell1
- E. A. Clark & Co.1