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Patent applications and USPTO patent grants for Bergendahl; Bruce A..The latest application filed is for "digital telephone switch with simultaneous dual pcm format compatibility".
Patent | Date |
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Digital telephone switch with simultaneous dual PCM format compatibility Grant 5,060,227 - Finley , et al. October 22, 1 | 1991-10-22 |
Individual subchannel loopback in the PCM interfaces of a digital telephone exchange with control of the outbound path Grant 4,860,281 - Finley , et al. August 22, 1 | 1989-08-22 |
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