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US Patent: 3,441,684
Anti-side tone circuit Telephony circuit
Patentee: Robert B. McLeod (exact or similar names) - Clinton, MA USPTO Classifications: 333/117, 333/32, 379/392 Tool Categories: Assignees: E. W. Bliss Co. - Canton, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Sep. 12, 1966 Granted: Apr. 29, 1969 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for E. W. Bliss Co.

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