LEE DEFOREST
1873-1961
"FATHER OF RADIO"
INVENTOR OF THE
OFFICIAL
FIRST DAY
OF ISSUE
Art Craft
AUDION TUBE
Progress in
Electronics
SERIES OF 1973 J.S. Sundsey
4314 Nelson D. Peorin Ill.
De Forest
Audions
11c
AIRMAIL
Progress in Electronics
Jue
197
Deforest
Andions
COCOS
Progress in Electronics
FIRST DAY OF ISSUE
De Forest
Audions
AIRMAIL
De Forest
Audions
Progress in Electronics
11c
AIRMAIL
AIRMAIL
Progress in Electronics
