Wednesday, September 21, 1983 United States of America will issue: Se-tenant "American Inventors Block of 4" face value 20, Se-tenant "American Inventors" face value 4*20, Stamp "Charles Steinmetz and Curve on Graph" face value 20, Stamp "Edwin Armstrong and Frequency Modulator" face value 20, Stamp "Nikola Tesla and Induction Motor" face value 20, Stamp "Philo T. Farnsworth and First Televison Camera" face value 20,
| Country: | United States of America |
|---|---|
| Issue: | American Inventors Issue |
| Date: | 1983-09-21 |
| Print: | Recess |
| Perforation: | 11 |
| Emission: | Commemorative |
| Format: | Se-tenant |
| Face Value: | 20 United States cent |
| Country: | United States of America |
|---|---|
| Issue: | American Inventors Issue |
| Date: | 1983-09-21 |
| Perforation: | 11 |
| Emission: | Commemorative |
| Format: | Se-tenant |
| Face Value: | 4*20 United States cent |
| Country: | United States of America |
|---|---|
| Issue: | American Inventors Issue |
| Date: | 1983-09-21 |
| Print: | Recess |
| Perforation: | 11 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 20 United States cent |
| Country: | United States of America |
|---|---|
| Issue: | American Inventors Issue |
| Date: | 1983-09-21 |
| Print: | Recess |
| Perforation: | 11 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 20 United States cent |
| Print run: | 48000000 |
| Country: | United States of America |
|---|---|
| Issue: | American Inventors Issue |
| Date: | 1983-09-21 |
| Print: | Recess |
| Perforation: | 11 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 20 United States cent |
| Country: | United States of America |
|---|---|
| Issue: | American Inventors Issue |
| Date: | 1983-09-21 |
| Print: | Recess |
| Perforation: | 11 |
| Emission: | Commemorative |
| Format: | Stamp |
| Face Value: | 20 United States cent |