| Abbreviation | Full Name |
| A.A. | {Unattributed} |
| A.G.E.E. | Australian Glass |
| A.G.M. | Australian Glass Manufacturers |
| A.T.& T.CO. | American Telephone & Telegraph Company |
| A.U. | American Union |
| AM.INSULATOR CO. | American Insulator Company |
| AM.TEL.& TEL.CO. | American Telephone & Telegraph Company |
| B & O | Baltimore & Ohio [Railroad] |
| B.C.DRIP | {Unattributed} |
| B.E.L.CO. | {Unattributed?} |
| B.F.G.CO. | Beaver Falls Glass Company |
| B.G.M.CO. | Baltimore Glass Manufacturing Company |
| B.T.C. | Bell Telephone Company |
| C.& P.TEL.CO. | Chesapeake & Potomac Telephone Company |
| C.C.G. | Crown Crystal Glass Company Ltd. |
| C.D.& P.TEL.CO. | Central District & Printing Telegraph Company |
| C.E.L.CO. | Cambridge Electric Light Company? |
| C.E.W. | California Electric Works |
| C.G.I.CO. | California Glass Insulator Company |
| C.N.R. | Canadian Northern Railway |
| C.P.R. | Canadian Pacific Railway |
| C.T.N.E. | Compania Telfonica Nacional de Espana |
| CAL.ELEC.WORKS | California Electric Works |
| CANADIAN PACIFIC RY.CO. | Canadian Pacific Railway Company |
| CHICAGO INSULATING CO. | Chicago Insulating Company |
| CIA COMERCIAL | Compania Comercial |
| CIA TELEFONICA | Compania Telefonica |
| D.T.CO. | Dominion Telegraph Company |
| DERF | Derflingher |
| E.C.& M.CO. | Electrical Construction & Maintenance Company |
| E.D.R. | Edmonton Dunvegan Railway |
| E.L.CO. | Edwin Lewis Company? |
| E.R. | Erie Railway |
| E.R.W. | Erie Railway Western |
| E.S.A. | Esperanza S. A. |
| E.S.B.CO. | Electric Storage Battery Company |
| E.S.S.CO. |
Electrical Service Supplies Company |
| EIV | Europeenne d'Isolateurs en Verre |
| ELECTRICAL SUPPLY CO. | Electrical Supply Company |
| F.F.C.C.N.DE M. | Ferrocarriles Nacionales de Mexico |
| FT.W.E.CO. | Fort Wayne Electric Company |
| G.E.CO. | General Electric Company |
| G.N.R. | Great Northern Railway |
| G.N.W.TEL.CO. | Great Northwestern Telegraph Company |
| G.P.R. | Great Pacific Railway |
| G.T.P.TEL.CO. | Grand Trunk Pacific Telegraph Company |
| H.B.R. | Hudson Bay Railway |
| H.G.CO. | Hemingray Glass Company |
| H.G.W. | Hero Glass Works? |
| JEFFREY MFG.CO. | Jeffrey Manufacturing Company |
| K.C.G.W. | King City Glass Works |
| L.G.T.& CO. | L.G. Tillotson & Company |
| M.& E.CO. | Mayer & Englund Company |
| M.T.CO. | Montreal Telegraph Company |
| MCKEE & CO. | McKee & Company |
| N DE M | Ferrocarriles Nacionales de Mexico |
| N.A.T.Co. | North American Telegraph Company |
| N.E.G.M.CO. | New England Glass Manufacturing Company |
| N.W.& B.I.T.CO. | New Westminister & Burrard Inlet Telephone Company |
| N.Y.& E.R.R. | New York & Erie Railroad |
| NATIONAL BATTERY CO. | National Battery Company |
| NATIONAL INSULATOR CO. | National Insulator Company |
| NEW ENG.TEL.& TEL.CO. | New England Telephone & Telegraph Company |
| O.V.G.CO. | Ohio Valley Glass Company |
| OAKMAN MFG.CO. | Oakman Manufacturing Company |
| P & W | Pittsburgh & Western Railway Company |
| P.F.C. | Anciens Etablissements Parvillee Freres & Cie. |
| P.L.W. | Pennsylvania Lines West |
| P.R.R. | Pennsylvania Railroad |
| P.S.S.A. | Patricio Sordo Sociedad Ananimo |
| R.Y T. | {Unattributed} |
| S.A.F.N.V. | Sociedad Anonima Fabrica Nacional de Vidrio |
| S.B.T.& T.CO. | Southern Bell Telephone & Telegraph Company |
| S.F. | {Unattributed?} |
| S.S.& CO. | Shay, Stephens & Company |
| SO EX CO | Southern Express Company? |
| SO.MASS.TEL.CO. | Southern Massachusetts Telephone Company |
| STANDARD GLASS INSULATOR CO. | Standard Glass Insulator Company |
| T-H. | Thompson-Houston |
| T-H.E.CO. | Thompson-Houston Electric Company |
| T.C.R. | Transcontinental Railway? |
| TEL.FED.MEX. | Telegrafos Federales Mexico |
| TILLOTSON & CO. | Tillotson & Company |
| U.P.R.R. | Union Pacific Railroad |
| U.S.L. | United States Light? |
| U.S.LIGHT & HEATING CO. | United States Light & Heating Company |
| U.S.TEL.CO. | United States Telephone Company |
| V.B. | {Marking} |
| V.M.R.NAPOLI | [Italy] |
| VI-BO | Villegas-Botero, Limitada |
| VTS | Village Telephone Supply |
| W.E.MFG.CO. | Western Electric Manufacturing Company |
| W.F.G.CO. | Western Flint Glass Company |
| W.G.M.CO. | Western Glass Manufacturing Company |
| W.U. | Western Union |
| W.U.T.CO. | Western Union Telegraph Company |
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