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Path of Progress.
- Source :
- TIME Magazine; 8/14/1939, Vol. 34 Issue 7, p40-40, 1/2p
- Publication Year :
- 1939
- Subjects :
- UNITED States. Patent Office
VACUUM technology
INVENTIONS
Subjects
Details
- Language :
- English
- ISSN :
- 0040781X
- Volume :
- 34
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- TIME Magazine
- Publication Type :
- Periodical
- Accession number :
- 54820903