Patent CA856904A successfully refreshed from Google Patents.
CA856904A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Polarity sensitive voltage insertion circuit for long subscriber loops
Assignee: AT&T Inc
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Filing: —
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Granted: 1970-11-24
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Expires: 1987-11-24
Abstract
No abstract record available.
Inventors
- 👤 Irving M. Mcnair, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-29 11:31
CPC Classifications
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Claims Analysis
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