Patent:US2493229
Brevetto: | US 2493229 |
Titolo: | Instrument for Drawing Ellipses or the like |
Data: | 03.01.1950 |
Luogo: | |
Nazione: | Stati Uniti |
Persona: | Dibrell, J. W. (P) et al |
Ditta: | |
Link interni: | Ellipsograph |
Keywords: | |
Link al brevetto: (without guarantee) | ![]() ![]() |
- DATUM: 03.01.1950
- TITEL: Instrument for drawing ellipses or the like
- PERSON: DIBRELL