Patents

Products

75 Items. Showing Items 1 thru 20.
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Signal and Switch Apparatus for Telephones - 1880 dated Patent Inv# PT1001 New Item! State(s): District Of Columbia Years: 1880 $50.00	Telephone Receiving Apparatus - 1881 dated Patent Inv# PT1002 New Item! State(s): District Of Columbia Years: 1881 $50.00
Telephone Switch - 1883 dated Patent Inv# PT1003 New Item! State(s): District Of Columbia Years: 1883 $50.00	Circuit for Telephone Call Boxes - 1883 dated Patent Inv# PT1004 New Item! State(s): District Of Columbia Years: 1883 $50.00
Telephone Case - 1884 dated Patent Inv# PT1005 New Item! State(s): District Of Columbia Years: 1884 $50.00	Telephone Switch - 1884 dated Patent Inv# PT1006 New Item! State(s): District Of Columbia Years: 1884 $50.00
Telephone Switch - 1885 dated Patent Inv# PT1007 New Item! State(s): District Of Columbia Years: 1885 $50.00	Gravity Telephone Switch - 1885 dated Patent Inv# PT1008 New Item! State(s): District Of Columbia Years: 1885 $50.00
Metallic Circuit for Multiple Switch Boards - 1887 dated Patent Inv# PT1009 New Item! State(s): District Of Columbia Years: 1887 $50.00	Telephone Switch - 1887 dated Patent Inv# PT1010 New Item! State(s): District Of Columbia Years: 1887 $50.00
Local Battery Circuit for Multiple Switch Board Systems - 1887 dated Patent Inv# PT1011 New Item! State(s): District Of Columbia Years: 1887 $50.00	Telephone Call Box - 1887 dated Patent Inv# PT1012 New Item! State(s): District Of Columbia Years: 1887 $50.00
Telephone Sub-Station Apparatus - 1888 dated Patent Inv# PT1013 New Item! State(s): District Of Columbia Years: 1888 $50.00	Telephone System - 1888 dated Patent Inv# PT1014 New Item! State(s): District Of Columbia Years: 1888 $50.00
Telephone Exchange Apparatus - 1892 dated Patent Inv# PT1015 New Item! State(s): District Of Columbia Years: 1892 $50.00	Trunk Line Signal - 1893 dated Patent Inv# PT1016 New Item! State(s): District Of Columbia Years: 1893 $50.00
Signaling Apparatus and Circuit - 1893 dated Patent Inv# PT1017 New Item! State(s): District Of Columbia Years: 1893 $50.00	Telephone Switch - 1893 dated Patent Inv# PT1018 New Item! State(s): District Of Columbia Years: 1893 $50.00
Magneto Telephone - 1894 dated Patent Inv# PT1019 New Item! State(s): District Of Columbia Years: 1894 $50.00	Telephone Receiver - 1895 dated Patent Inv# PT1020 New Item! State(s): District Of Columbia Years: 1895 $50.00