Name Size Creator Creation Date Labels Comment  
PDF File 2025912.pdf 554 kB Shaun Ewing Dec 31, 1935 00:00
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US-2025912-A // Signaling system employing glow discharges // Swart Leland Kasson // American Telephone & Telegraph
PDF File 2025880.pdf 1.20 MB Shaun Ewing Dec 31, 1935 00:00
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US-2025880-A // Telephone system // Mcdavitt Marcellus Balli // American Telephone & Telegraph
PDF File 2025158.pdf 242 kB Shaun Ewing Dec 24, 1935 00:00
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US-2025158-A // Modulating system // Cowan Frank Augustus // American Telephone & Telegraph
PDF File 2025145.pdf 844 kB Shaun Ewing Dec 24, 1935 00:00
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US-2025145-A // Transmission system // Bascom Henry M. ; Friend Otto A. ; Mcdavitt Marcellus B. // American Telephone & Telegraph
PDF File 2024280.pdf 459 kB Shaun Ewing Dec 17, 1935 00:00
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US-2024280-A // Means to reduce the effect of interfering currents on telephone circuits // Edwards William Hopple ; Dietze Eginhard // American Telephone & Telegraph
PDF File 2024275.pdf 390 kB Shaun Ewing Dec 17, 1935 00:00
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US-2024275-A // Potentiometer device // Clark Jean Harold // American Telephone & Telegraph
PDF File 2023556.pdf 1.24 MB Shaun Ewing Dec 10, 1935 00:00
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US-2023556-A // Frequency selective communication system // Stone John Stone // American Telephone & Telegraph
PDF File 2023504.pdf 535 kB Shaun Ewing Dec 10, 1935 00:00
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US-2023504-A // Radio receiving apparatus // Bailey Rand S. // American Telephone & Telegraph
PDF File 2022790.pdf 424 kB Shaun Ewing Dec 03, 1935 00:00
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US-2022790-A // Frequency indicating system // Sturdy William Werner // American Telephone & Telegraph
PDF File 2022758.pdf 273 kB Shaun Ewing Dec 03, 1935 00:00
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US-2022758-A // Ground detecting arrangement // Corderman Roy C. // American Telephone & Telegraph
PDF File 2022248.pdf 618 kB Shaun Ewing Nov 26, 1935 00:00
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US-2022248-A // Television equipment // Lofgren Benjamin F. // American Telephone & Telegraph
PDF File 2021984.pdf 287 kB Shaun Ewing Nov 26, 1935 00:00
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US-2021984-A // Coin collector // Chase Leland Henry // American Telephone & Telegraph
PDF File 2021978.pdf 321 kB Shaun Ewing Nov 26, 1935 00:00
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US-2021978-A // Testing system // Almquist Milton Leroy ; Edwards Paul Griffith ; Clutts Charles Edward // American Telephone & Telegraph
PDF File 2021270.pdf 536 kB Shaun Ewing Nov 19, 1935 00:00
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US-2021270-A // Electrical protective system // Swart Leland K. // American Telephone & Telegraph
PDF File 2021269.pdf 639 kB Shaun Ewing Nov 19, 1935 00:00
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US-2021269-A // Electrical protective system // Swart Leland Kasson // American Telephone & Telegraph
PDF File 2021268.pdf 487 kB Shaun Ewing Nov 19, 1935 00:00
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US-2021268-A // Electrical protective system // Swart Leland Kasson // American Telephone & Telegraph
PDF File 2020487.pdf 674 kB Shaun Ewing Nov 12, 1935 00:00
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US-2020487-A // Electrical signaling // Wadsworth Paul W. ; Taylor Charles C. // Bell Telephone Labor Inc ; American Telephone & Telegraph
PDF File 2020409.pdf 1.12 MB Shaun Ewing Nov 12, 1935 00:00
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US-2020409-A // Band separation system // Green Estill I. // American Telephone & Telegraph
PDF File 2020308.pdf 587 kB Shaun Ewing Nov 12, 1935 00:00
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US-2020308-A // Ocean cable system // Gannett Danforth King // American Telephone & Telegraph
PDF File 2019577.pdf 366 kB Shaun Ewing Nov 05, 1935 00:00
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US-2019577-A // System of variable amplification // Mitchell Doren ; Schott Lionel // American Telephone & Telegraph
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