| Brighton Mushroom Farm | Napoleon | OH |
| Britton Service | Cleveland | OH |
| Broadmoor School | Mentor | OH |
| Broadview Heights Hospital | Brecksville | OH |
| Broadway High Service Pumping Station | Toledo | OH |
| Broadway Pumping Station | Toledo | OH |
| Brocalsa Chemical | Syracuse | OH |
| Brodess Construction | Cleveland | OH |
| Bromaid Steel | Warren | OH |
| Bronson Portland Cement | Cleveland | OH |
| Brose & Baumgartner | New Washington | OH |
| Brost Foundry | Cleveland | OH |
| Brown-Bonnell Iron | Youngstown | OH |
| Brownell Stoker & Combustion | Canton | OH |
| Brownell Stoker & Combustion | Dayton | OH |
| Brown Fintube | Elyria | OH |
| Brown Flo, Sicker, Comb | Canton | OH |
| Brown Graves | Akron | OH |
| Brown Hoisting Machinery | Cleveland | OH |
| Browning Engineering & Manufacturing | Cleveland | OH |
| Browning Engineering & Manufacturing | Mansfield | OH |
| Brown Memorial Hospital | Conneaut | OH |
| Brown Plastering | Cincinnati | OH |
| Brown Steel | Columbus | OH |
| Bruckman Brewing | Cincinnati | OH |
| Brunswick Elementary School | Brunswick | OH |
| Brush Beryllium | Cleveland | OH |
| Brush Beryllium | Elmore | OH |
| Brush Electric Light And Power | Cleveland | OH |
| Brush Laboratories | Cleveland | OH |
| Brush Laboratories | Bedford | OH |
| Brush Wellman | Elmore | OH |
| Brush Wellman | Toledo | OH |
| Brush Wellman | Cleveland | OH |
| Bryan Municipal Light & Power | Bryan | OH |
| B & T Metals | Columbus | OH |
| Buckeye Brewing | Toledo | OH |
| Buckeye Bumpers Division | Springfield | OH |
| Buckeye Cellulose | Dayton | OH |
| Buckeye Cereal | Massillon | OH |
| Buckeye Cotton Oil | Cincinnati | OH |
| Buckeye Electric | Cleveland | OH |
| Buckeye Engine | Salem | OH |
| Buckeye Foundry | Cincinnati | OH |
| Buckeye Insulation | Cleveland | OH |
| Buckeye Iron & Brass Works | Dayton | OH |
| Buckeye Malleable Iron & Coupler | Columbus | OH |
| Buckeye Ordnance Works | Ironton | OH |
| Buckeye Ordnance Works | South Point | OH |
| Buckeye Pipe Line | Mantua | OH |
