Donald Lars Duttweiler

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Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Patent

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Block digital processor for use with nonuniformly encoded digita

Communications: electrical – Audible indication – Percussion-type sound producer
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Data optimized codec

Pulse or digital communications – Pulse code modulation
Reexamination Certificate

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Digital signal processing arrangement using a cascaded integrato

Communications: electrical – Audible indication – Percussion-type sound producer
Patent

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Echo canceler E-side speech detector

Telephonic communications – Subscriber line or transmission line interface – Network interface device
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Profile ID: LFUS-PAI-P-29973

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