Products
- Baltimore and Ohio Rail-Road Company
- Baltimore and Ohio Railroad Company
- Baltimore and Ohio Railroad Company
- Baltimore and Ohio Railroad Company
- Baltimore and Ohio Railroad Company
- Baltimore and Ohio Railroad Company
- Baltimore and Ohio Railroad Company
- Baltimore and Ohio Railroad Company
- Baltimore and Ohio Railroad Company (Older Dates)
- Baltimore and Ohio Southwestern Railway Company
- Baltimore and Ohio Southwestern Railway Company
- Baltimore and Philadelphia Steamboat Company (Ericsson Line)
- Baltimore and Philadelphia Steamboat Company (Ericsson Line)
- Baltimore Baseball Club, Inc. (Orioles)
- Baltimore Baseball Club, Inc. (Orioles)
- Baltimore Consolidated Railway Company
- Baltimore National Bank
- Baltimore Orioles, Inc.
- Baltimore Refrigerating and Heating Company of Baltimore City
- Baltimore Refrigerating and Heating Company of Baltimore City
- Baltimore Ship Supply Company
- Baltimore Shipbuilding and Dry Dock Company of Baltimore City
- Baltimore Transit Company
- Baltimore Trust Company
- Bamberger-De Lamar Gold Mines Company (Signed by Simon Bamberger)
- Bangor & Aroostook Corporation
- Bangor and Aroostook Railroad Company
- Bankers Trust New York Corporation
- Bannie Gold & Copper Mining Company
- Bardy Projector Co.
- Baring Cross Bridge Company
- Barton Instrument Corporation
- Baruch-Foster Corporation
- Baseball Magazine Company
- Basin Montana Tunnel Company (Comet Mine)
- Batavia and Northern Railroad Company
- Batchelder, Snyder, Door & Doe Company
- Baton Rouge, Hammond and Eastern Railroad Company
- Baumann Mines Company (Signed by Jules Baumann)
- Baxter Laboratories, Inc.
- Baxter Laboratories, Inc.
- Bay Area Ghosts, Inc. (San Francisco Documentary)
- Bay Biscayne Bridge Company
- Bay Shore and Fort Point Road Co. (San Francisco)
- Bayano River Lumber Company
- Beacon Chocolate Company
- Bear Creek and Western Railway Company
- Bear Magneto Electric Company
- Beatrice Foods Co.
- Beaver Creek Distillery, Inc.
- Beech Creek Railroad Company
- Beech Creek Railroad Company
- Beech Creek Railroad Company
- Beech Creek, Clearfield and South Western Rail Road Company (Signed by Cornelius Vanderbilt)
- Belasco Productions, Inc.
- Belden Corporation
- Belding Heminway Company, Inc.
- Belknap Hardware and Manufacturing Company
- Bell Atlantic Corporation
- Bell Atlantic Corporation
- Bellaire, Zanesville and Cincinnati Railway Company
- Belleville and Southern Illinois Railroad Company
- Belleville and Southern Illinois Railroad Company
- Belleville and Southern Illinois Railroad Company
- Belmont Iron Works
- Belmont-Osborn Mining Company
- Belt Rail Road and Stock Yard Co.
- Belt Rail Road and Stock Yards Company
- Benedict-Manson Marine Company
- Benihana National Corp.
- Bergen County Railroad Company
- Bergen County Railroad Company
- Berkeley Canning and Manufacturing Company (Fort Sumter Vignette)
- Berkshire Fine Spinning Associates, Inc. (Became Berkshire Hathaway)
- Berkshire Mining & Development Company
- Bernheimer-Leader Stores, Incorporated
- Bethlehem and Nazareth Passenger Railway Company
- Bethlehem Motors Corporation
- Bethlehem Steel Corporation
- Bethlehem Steel Corporation
- Bethlehem Steel Corporation
- Bethlehem Steel Corporation
- Bethlehem Steel Corporation
- Big Blackfoot Railway Company
- Big Gusher Oil Co.
- Big Level & Kinzua Railroad Company
- Big Sandy Railway Company
- Big Stony Railway Company
- Billings Cold Storage Company
- Bingham Mary Copper Company (Signed by Simon Bamberger)
- Bisbee Straight Motion Engine Co.
- Bishop Industries, Inc. (Kiss-Proof Lipstick)
- Black Hills Copper Company Limited
- Black Range Mining Co.
- Blacklick and Conemaugh Petroleum and Mining Company
- Bleecker St. & Fulton Ferry Rail Road Company
- Bloomsburg Silk Mill (Signed by Joseph Ratti)
- Blue Bird Oil Corporation
- Blumberg Motor Manufacturing Company (Texas)
- Bluster Consolidated Mines Company (Issued to and Signed by George Wingfield)