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US2801725A
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Conveying device
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US2891467A
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Marking device for edge-wise conveyor systems
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GB727109A
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Braking device for the carriers of pneumatic tube systems
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US2799385A
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On-edge conveyor system, particularly for the distribution of flat objects, such as letters or postcards
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GB729836A
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Improvements in or relating to conveyor systems for conveying flat objects (such as letters or post cards) in anupright or nearly upright position
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DE897579C
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Circuit arrangement for search dialers in telecommunications systems
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DE899680C
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Subscriber circuit for call seekers
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DE846871C
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Circuit arrangement for automatic distribution of calls
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DE900584C
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Circuit arrangement for small private branch exchanges with mains supply
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DE803912C
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Circuit arrangement for manually operated switching devices
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DE904905C
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Compensation element for the capacitive and complex compensation of telecommunication cable systems
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DE900708C
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High-frequency telephony transmission system for high-voltage lines
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DE839949C
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Transmission method for audio frequency dialing characters
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DE818812C
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Circuit arrangement for controlling cross-connections in telephone dial-up traffic
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ES160616A1
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Contact bank for selectors
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ES160562A1
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A disposition for several selectors maneuvered by the same series of number current impulses and working in parallel connection
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ES160544A1
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A provision for several selectors maneuvered by the same series of number current impulses and working in parallel connection
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ES159790A1
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Contact bank for selectors
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DE740183C
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Device for distributing mail or the like on adjustable conveyor containers of several conveyor trains
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DE739262C
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Device for the automatic evaluation of signals consisting of alternating current signals of a certain length
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