A Tribute to American Inventors 1983

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Stock #: 558463

Type: First Day Cover

Postmark: 1983 Sep-21

Postmark City: Washington

Postmark State: DC

Stamp: 20c

Size: 3.75" x 6.5" (10 x 16.5 cm)

Additional Details:

Charles Steinmetz, Electrical Theories - Edwin Armstrong, Frequency Modulation - Nikola Tesla, Induction Motor - Philo T. Farnsworth, First TV Camera

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