341 records.
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1929 2c Edison's First Lamp, Flat Plate US #654

1929 2c Edison's First Lamp, Flat Plate

$1.00- $225.00
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1929 2c Edison's First Lamp, Rotary US #655

1929 2c Edison's First Lamp, Rotary

$0.30- $357.00
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1929 2c Edison's 1st Lamp,Coil Perf 10 US #656

1929 2c Edison's 1st Lamp,Coil Perf 10

$1.85- $250.00
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1939 3c Printing Tercentenary US #857

1939 3c Printing Tercentenary

$0.20- $25.00
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1940 1c John James Audubon US #874

1940 1c John James Audubon

$0.25- $22.50
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1940 American Scientists 5V US #874-78

1940 American Scientists 5V

$3.10- $5.00
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1940 2c Dr. Crawford W. Long US #875

1940 2c Dr. Crawford W. Long

$0.20- $22.50
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1940 3c Luther Burbank US #876

1940 3c Luther Burbank

$0.30- $35.00
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1940 5c Dr. Walter Reed US #877

1940 5c Dr. Walter Reed

$0.35- $55.00
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1940 10c Jane Addams US #878

1940 10c Jane Addams

$1.50- $280.00
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1944 3c Telegraph US #924

1944 3c Telegraph

$0.20- $20.00
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1944 3c Motion Picture US #926

1944 3c Motion Picture

$0.25- $25.00
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1947 3c Thomas A. Edison US #945

1947 3c Thomas A. Edison

$0.20- $35.00
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1956 3¢ Benjamin Franklin US #1073

1956 3¢ Benjamin Franklin

$0.20- $27.50
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1956 3¢ Pure Food and Drug Act US #1080

1956 3¢ Pure Food and Drug Act

$0.20- $28.00
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1963 5c Science US #1237

1963 5c Science

$0.20- $18.50
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1965 11c International Telecommunication Union US #1274

1965 11c International Telecommunication Union

$0.75- $38.00
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1966 8c Albert Einstein US #1285

1966 8c Albert Einstein

$0.20- $55.00
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1967 5c Voice of America US #1329

1967 5c Voice of America

$0.20- $18.50
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1972 7c Benjamin Franklin US #1393D

1972 7c Benjamin Franklin

$0.20- $40.00
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1973 6c Marconi's Spark Coil and Gap US #1500

1973 6c Marconi's Spark Coil and Gap

$0.20- $18.50
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1973 8c Transistors and Printed Circuit US #1501

1973 8c Transistors and Printed Circuit

$0.20- $19.50
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1973 15c Progress in Audio & Visual Electronics US #1502

1973 15c Progress in Audio & Visual Electronics

$0.50- $37.50
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1974 10c Energy Conservation US #1547

1974 10c Energy Conservation

$0.20- $25.00
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1976 13c Telephone Centennial US #1683

1976 13c Telephone Centennial

$0.20- $30.00
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1976 13c Chemistry Centenary US #1685

1976 13c Chemistry Centenary

$0.20- $32.00
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1977 13c Sound Recording US #1705

1977 13c Sound Recording

$0.20- $33.50
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1977 Nation's Energy, Conservation 13c US #1723

1977 Nation's Energy, Conservation 13c

$0.20- $3.20
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1977 13c Energy Conservation US #1723-24

1977 13c Energy Conservation

$0.30- $30.00
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1978 13c Early Cancer Detection US #1754

1978 13c Early Cancer Detection

$0.20- $30.00
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1978 15c Photography US #1758

1978 15c Photography

$0.20- $29.50
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1978 15c Viking Missions to Mars US #1759

1978 15c Viking Missions to Mars

$0.20- $34.50
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1979 15c Albert Einstein US #1774

1979 15c Albert Einstein

$0.20- $37.50
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1982 37c Robert Millikan US #1866

1982 37c Robert Millikan

$0.20- $135.00
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1981 18c International Year of the Disabled US #1925

1981 18c International Year of the Disabled

$0.20- $45.00
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1982 20c Solar Energy US #2006

1982 20c Solar Energy

$0.20- $3.20
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1982 20c Knoxville World's Fair US #2006-09

1982 20c Knoxville World's Fair

$0.75- $58.00
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1982 20c Synthetic Fuels US #2007

1982 20c Synthetic Fuels

$0.20- $3.20
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1982 20c Breeder Reactor US #2008

1982 20c Breeder Reactor

$0.20- $3.20
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1982 20c Fossil Fuels US #2009

1982 20c Fossil Fuels

$0.20- $3.20
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1983 20c Science & Industry US #2031

1983 20c Science & Industry

$0.20- $45.00
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1983 20c Joseph Priestley US #2038

1983 20c Joseph Priestley

$0.20- $45.00
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1983 20c Electrical Theories C Steinmetz US #2055

1983 20c Electrical Theories C Steinmetz

$0.20- $3.20
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1983 20c American Inventors US #2055-58

1983 20c American Inventors

$0.75- $53.00
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1983 20c Frequncy Modulation E.Armstrong US #2056

1983 20c Frequncy Modulation E.Armstrong

$0.20- $3.20
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1983 20c Induction Motor N. Tesla US #2057

1983 20c Induction Motor N. Tesla

$0.20- $3.20
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1983 20c First TV Camera P.T. Farnsworth US #2058

1983 20c First TV Camera P.T. Farnsworth

$0.20- $2.50
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1984 20c Health Research US #2087

1984 20c Health Research

$0.20- $50.00
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