Name Size Creator Creation Date Labels Comment  
PDF File 1784176.pdf 551 kB Shaun Ewing Dec 09, 1930 00:00
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US-1784176-A // Equalization for carrier systems // Carpe Allen // American Telephone & Telegraph
PDF File 1784178.pdf 693 kB Shaun Ewing Dec 09, 1930 00:00
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US-1784178-A // Voice-controlled circuits // Carpe Allen // American Telephone & Telegraph
PDF File 1784194.pdf 629 kB Shaun Ewing Dec 09, 1930 00:00
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US-1784194-A // Transmission frequency-delay-measuring circuit // Mitchell Doren // American Telephone & Telegraph
PDF File 1784891.pdf 527 kB Shaun Ewing Dec 16, 1930 00:00
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US-1784891-A // Privacy signaling system // Dean Samuel W. ; Anderson Clifford N. // American Telephone & Telegraph
PDF File 1784898.pdf 266 kB Shaun Ewing Dec 16, 1930 00:00
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US-1784898-A // Circuit switch // Gary Laurence A. ; Tasker Homer G. // American Telephone & Telegraph
PDF File 1784905.pdf 980 kB Shaun Ewing Dec 16, 1930 00:00
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US-1784905-A // Telephone-exchange system // Morency George H. // American Telephone & Telegraph
PDF File 1785818.pdf 393 kB Shaun Ewing Dec 23, 1930 00:00
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US-1785818-A // Telephone system // Peterson George H. ; Rhodes William A. // American Telephone & Telegraph
PDF File 1785819.pdf 642 kB Shaun Ewing Dec 23, 1930 00:00
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US-1785819-A // Prevention of parasitic oscillations // Silent Harold C. // American Telephone & Telegraph
PDF File 1786412.pdf 263 kB Shaun Ewing Dec 23, 1930 00:00
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US-1786412-A // Shielding arrangement // Crisson George // American Telephone & Telegraph
PDF File 1786546.pdf 586 kB Shaun Ewing Dec 30, 1930 00:00
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US-1786546-A // Power-standard device // Nyquist Harry // American Telephone & Telegraph
PDF File 1786549.pdf 568 kB Shaun Ewing Dec 30, 1930 00:00
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US-1786549-A // Method and means for preparing insulating sleeves // Reed Thomas C. ; Odell Aubrey D. // American Telephone & Telegraph
PDF File 1786565.pdf 284 kB Shaun Ewing Dec 30, 1930 00:00
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US-1786565-A // Thrust bearing // Freeman Albert E. // American Telephone & Telegraph
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