Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1994-10-03
1996-03-26
Davis, Antoine Duval
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
Patent
active
D03682706
REFERENCES:
patent: D189619 (1961-01-01), Barradas
patent: D220969 (1971-05-01), Lazzo, III
patent: D235779 (1975-07-01), Barr
patent: D249658 (1978-09-01), Fields
patent: D315144 (1991-03-01), Dard et al.
patent: 3806797 (1974-04-01), Harvey
patent: 4879437 (1989-11-01), Dard et al.
Single page of advertisement from Jan. 1993, CQ Amateur Radio, p. 33 showing SWR Analyzers: 1. MFJ-249; and 2. MFG-209, 207, 208, 203, and 205.
Davis Antoine Duval
Ewing, IV James L.
MFJ Enterprises, Inc.
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