- Buffalo Forge Co.2
- Buffalo Specialty Company3
- Buffalo Storage and Carting Company1
- Burch Plow Works1
- Butler Brothers1
- C. & G. Cooper Co.1
- C. G. Brown Furniture Co.1
- C. H. & E. S. Goldberg1
- C. M. Linington1
- C. Schmidt & Co.1
- C. W. Farmer Engraving Company1
- C. W. Hunt Company1
- Capon Spring & Baths1
- Carl Joseph & Co.1
- Carnie-Goudie Mfg. Co.1
- Cass-Smurr-Damerel Co.1
- Cataract House1
- Caughey-Jossman Co.1
- Central Ohio Paper Company1
- Chalfant, Jones & Co.1
- Champion Compress and Warehouse Company1
- Chapman Valve Manufacturing Co.1
- Charles Maxwell Company1
- Charles Mayer & Co.1
- Chas F. Graham1
- Chas. Weiland1
- Chase Turbine M'f'g Co.1
- Chatfield & Woods1
- Chattanooga Paint Company1
- Cincinnati Pump Co.1
- Claflen Paving Co.1
- Clark & Wilkins Co.1
- Clarke & Courts Manufacturing Stationers1
- Clarke Bros. & Co.3
- Cleveland Window Glass Co.1
- Collins Plow Company1
- Columbia Hall1
- Columbus Bolt Works & Co.1
- Consolidated Engineering Co.1
- Cornell Wood Products Company1
- Cornish Co.1
- Cortland Wagon Co.1
- Cosmopolitan Hotel1
- Cowing & Co.1
- Crane & Breed Mfg. Co.1
- Crompton Loom Works1
- Crook's Bakery and Restaurant1
- Cross Brothers Company1
- Cutler & Porter1
- D. M. Osborne & Co.1
- D. N. Selleg1
- D. Robinson1
- Dana Hardware Co.1
- Davis & Rankin Bld. & Mfg. Co.1
- Des Moines Incubator Co.1
- Detrick Distilling Co.1
- Detroit Lubricator Co.1
- Detroit Stove Works2
- Dixie Manufacturing Co.1
- Dodge Manufacturing Co.4