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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 2227380.pdf | 6.89 MB | Shaun Ewing | Dec 31, 1940 00:00 |
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US-2227380-A // Routine testing circuit // Retallack John B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 6.89 MB | Shaun Ewing | Dec 31, 1940 00:00 | US-2227380-A // Routine testing circuit // Retallack John B. // Bell Telephone Labor Inc | ||||
| PDF File 2227268.pdf | 685 kB | Shaun Ewing | Dec 31, 1940 00:00 |
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US-2227268-A // Piezoelectric apparatus // Mason Warren P. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 685 kB | Shaun Ewing | Dec 31, 1940 00:00 | US-2227268-A // Piezoelectric apparatus // Mason Warren P. // Bell Telephone Labor Inc | ||||
| PDF File 2227093.pdf | 738 kB | Shaun Ewing | Dec 31, 1940 00:00 |
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US-2227093-A // Electron discharge device // Laico Joseph P. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 738 kB | Shaun Ewing | Dec 31, 1940 00:00 | US-2227093-A // Electron discharge device // Laico Joseph P. // Bell Telephone Labor Inc | ||||
| PDF File 2227048.pdf | 567 kB | Shaun Ewing | Dec 31, 1940 00:00 |
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US-2227048-A // Negative feedback amplifier // West Julian M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 567 kB | Shaun Ewing | Dec 31, 1940 00:00 | US-2227048-A // Negative feedback amplifier // West Julian M. // Bell Telephone Labor Inc | ||||
| PDF File 2226952.pdf | 1.13 MB | Shaun Ewing | Dec 31, 1940 00:00 |
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US-2226952-A // Switching circuit // Smethurst Joseph O. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.13 MB | Shaun Ewing | Dec 31, 1940 00:00 | US-2226952-A // Switching circuit // Smethurst Joseph O. // Bell Telephone Labor Inc | ||||
| PDF File 2226944.pdf | 545 kB | Shaun Ewing | Dec 31, 1940 00:00 |
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US-2226944-A // Method of bonding dissimilar metals // Reeve Howard T. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 545 kB | Shaun Ewing | Dec 31, 1940 00:00 | US-2226944-A // Method of bonding dissimilar metals // Reeve Howard T. // Bell Telephone Labor Inc | ||||
| PDF File 2226934.pdf | 458 kB | Shaun Ewing | Dec 31, 1940 00:00 |
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US-2226934-A // Acoustic device // Kannenberg Walter F. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 458 kB | Shaun Ewing | Dec 31, 1940 00:00 | US-2226934-A // Acoustic device // Kannenberg Walter F. // Bell Telephone Labor Inc | ||||
| PDF File 2226258.pdf | 890 kB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2226258-A // Grid bias modulating system // Reise Herman A. ; Skene Andrew A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 890 kB | Shaun Ewing | Dec 24, 1940 00:00 | US-2226258-A // Grid bias modulating system // Reise Herman A. ; Skene Andrew A. // Bell Telephone Labor Inc | ||||
| PDF File 2226238.pdf | 452 kB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2226238-A // Coupling circuit // Jr. Stephen Doba, // Bell Telephone Labor Inc | |||
| Version 1 (current) | 452 kB | Shaun Ewing | Dec 24, 1940 00:00 | US-2226238-A // Coupling circuit // Jr. Stephen Doba, // Bell Telephone Labor Inc | ||||
| PDF File 2225928.pdf | 1.29 MB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2225928-A // Multiple unit steerable antenna system // Ring Douglas H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.29 MB | Shaun Ewing | Dec 24, 1940 00:00 | US-2225928-A // Multiple unit steerable antenna system // Ring Douglas H. // Bell Telephone Labor Inc | ||||
| PDF File 2225907.pdf | 1.40 MB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2225907-A // Ringing current supply system // Duguid James M. ; Ross Walter S. ; Duyne Carlton W. Van // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.40 MB | Shaun Ewing | Dec 24, 1940 00:00 | US-2225907-A // Ringing current supply system // Duguid James M. ; Ross Walter S. ; Duyne Carlton W. Van // Bell Telephone Labor Inc | ||||
| PDF File 2225887.pdf | 1.14 MB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2225887-A // Signaling system // Roberts Leland C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.14 MB | Shaun Ewing | Dec 24, 1940 00:00 | US-2225887-A // Signaling system // Roberts Leland C. // Bell Telephone Labor Inc | ||||
| PDF File 2225697.pdf | 472 kB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2225697-A // Modulation // Hussey Luther W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 472 kB | Shaun Ewing | Dec 24, 1940 00:00 | US-2225697-A // Modulation // Hussey Luther W. // Bell Telephone Labor Inc | ||||
| PDF File 2225688.pdf | 7.51 MB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2225688-A // Telephone testing circuit // Dehn Joseph W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 7.51 MB | Shaun Ewing | Dec 24, 1940 00:00 | US-2225688-A // Telephone testing circuit // Dehn Joseph W. // Bell Telephone Labor Inc | ||||
| PDF File 2225653.pdf | 661 kB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2225653-A // Compensation for variations in phase change // Monk Newton // Bell Telephone Labor Inc | |||
| Version 1 (current) | 661 kB | Shaun Ewing | Dec 24, 1940 00:00 | US-2225653-A // Compensation for variations in phase change // Monk Newton // Bell Telephone Labor Inc | ||||
| PDF File 2225648.pdf | 581 kB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2225648-A // Printing telegraph system // Locke George A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 581 kB | Shaun Ewing | Dec 24, 1940 00:00 | US-2225648-A // Printing telegraph system // Locke George A. // Bell Telephone Labor Inc | ||||
| PDF File 2225646.pdf | 572 kB | Shaun Ewing | Dec 24, 1940 00:00 |
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US-2225646-A // Selector switch brush // Lewis Benjamin F. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 572 kB | Shaun Ewing | Dec 24, 1940 00:00 | US-2225646-A // Selector switch brush // Lewis Benjamin F. // Bell Telephone Labor Inc | ||||
| PDF File 2225488.pdf | 591 kB | Shaun Ewing | Dec 17, 1940 00:00 |
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US-2225488-A // Impulse translating apparatus // Stevens Ralph R. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 591 kB | Shaun Ewing | Dec 17, 1940 00:00 | US-2225488-A // Impulse translating apparatus // Stevens Ralph R. // Bell Telephone Labor Inc | ||||
| PDF File 2225478.pdf | 990 kB | Shaun Ewing | Dec 17, 1940 00:00 |
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US-2225478-A // Telephone system // Hovland Henry // Bell Telephone Labor Inc | |||
| Version 1 (current) | 990 kB | Shaun Ewing | Dec 17, 1940 00:00 | US-2225478-A // Telephone system // Hovland Henry // Bell Telephone Labor Inc | ||||
| PDF File 2225312.pdf | 450 kB | Shaun Ewing | Dec 17, 1940 00:00 |
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US-2225312-A // Acoustic device // Mason Warren P. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 450 kB | Shaun Ewing | Dec 17, 1940 00:00 | US-2225312-A // Acoustic device // Mason Warren P. // Bell Telephone Labor Inc |
