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American Bell Telephone
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Charles Williams Jr. Shop
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Dictograph Products
Elektrisk Bureau
Eureka Electric
Farr Telephone
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Hose-McCann
ITT
Kellogg Switchboard and Supply
Keystone Telephone
Krone
L.M. Ericsson
Leich
Lincoln Telephone
Manhattan Electrical Supply
MCI
Mianus Electric
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National Telephone Mfg. Co.
NEC Corp.
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Phoenix Electric Telephone Co.
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Roycroft Shops
S.H. Couch Co.
SAFNAT Milano
Siemens
Société Industrielle des Téléphones
Southern Bell
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Stromberg-Carlson
Swedish-American
Telequest
Televerket
Tyco (current)
Viaduct Manufacturing
Western Electric
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Wilhelm Telephone Mfg.
Wisconsin Telephone
Tyco
Novelty phone maker
From Wikipedia
Tyco International was a security systems company incorporated in Ireland, with operational headquarters in Princeton, New Jersey, United States. Tyco International was composed of two major business segments: security solutions and fire protection.
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