Name Size Creator Creation Date Labels Comment  
PDF File 1869884.pdf 340 kB Shaun Ewing Aug 02, 1932 00:00
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US-1869884-A // Testing device // Curtis Austen M. // Bell Telephone Labor Inc
PDF File 1869870.pdf 780 kB Shaun Ewing Aug 02, 1932 00:00
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US-1869870-A // Filtering circuits // Stevenson George H. // Bell Telephone Labor Inc
PDF File 1869484.pdf 627 kB Shaun Ewing Aug 02, 1932 00:00
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US-1869484-A // Peak voltage limiter // Knoop William A. // Bell Telephone Labor Inc
PDF File 1869466.pdf 331 kB Shaun Ewing Aug 02, 1932 00:00
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US-1869466-A // Voltage limiter // Cole Ira E. // Bell Telephone Labor Inc
PDF File 1869200.pdf 245 kB Shaun Ewing Jul 26, 1932 00:00
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US-1869200-A // Vacuum cleaner attachment // Linton Grant // Bell Telephone Labor Inc
PDF File 1869194.pdf 471 kB Shaun Ewing Jul 26, 1932 00:00
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US-1869194-A // Electrooptical system // Gray Frank // Bell Telephone Labor Inc
PDF File 1869184.pdf 405 kB Shaun Ewing Jul 26, 1932 00:00
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US-1869184-A // Jig // Burr George W. // Bell Telephone Labor Inc
PDF File 1869181.pdf 263 kB Shaun Ewing Jul 26, 1932 00:00
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US-1869181-A // Electric test connecter // Beck William O. // Bell Telephone Labor Inc
PDF File 1869178.pdf 1.57 MB Shaun Ewing Jul 26, 1932 00:00
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US-1869178-A // Sound translating device // Thuras Albert L. // Bell Telephone Labor Inc
PDF File 1869175.pdf 310 kB Shaun Ewing Jul 26, 1932 00:00
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US-1869175-A // Radio clock regulation // Sprague Clarence A. // Bell Telephone Labor Inc
PDF File 1869171.pdf 268 kB Shaun Ewing Jul 26, 1932 00:00
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US-1869171-A // Oscillation generator // Rose Charles F. P. // Bell Telephone Labor Inc
PDF File 1869160.pdf 192 kB Shaun Ewing Jul 26, 1932 00:00
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US-1869160-A // Piezo-electric resonator // Marrison Warren A. // Bell Telephone Labor Inc
PDF File 1868369.pdf 306 kB Shaun Ewing Jul 19, 1932 00:00
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US-1868369-A // Sound recording machine // Sailliard John H. // Bell Telephone Labor Inc
PDF File 1868366.pdf 649 kB Shaun Ewing Jul 19, 1932 00:00
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US-1868366-A // Driving mechanism // Pfannenstiehl Harry // Bell Telephone Labor Inc
PDF File 1868326.pdf 1.59 MB Shaun Ewing Jul 19, 1932 00:00
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US-1868326-A // Telephone system // King Gerald V. // Bell Telephone Labor Inc
PDF File 1868321.pdf 430 kB Shaun Ewing Jul 19, 1932 00:00
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US-1868321-A // Sound recording // Harrison Henry C. // Bell Telephone Labor Inc
PDF File 1868318.pdf 193 kB Shaun Ewing Jul 19, 1932 00:00
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US-1868318-A // Adjustable inductance // Greenidge Ralph M. C. // Bell Telephone Labor Inc
PDF File 1868315.pdf 318 kB Shaun Ewing Jul 19, 1932 00:00
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US-1868315-A // Continuously loaded conductor // Ellis William C. // Bell Telephone Labor Inc
PDF File 1868309.pdf 1.76 MB Shaun Ewing Jul 19, 1932 00:00
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US-1868309-A // Telephone system // Carpenter Warren W. ; Dahl Jack F. // Bell Telephone Labor Inc
PDF File 1868296.pdf 1.79 MB Shaun Ewing Jul 19, 1932 00:00
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US-1868296-A // Automatic telephone system // Stokely Ray L. // Bell Telephone Labor Inc
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