850. Vacuum pump filter: Leybold-Heraeus GmbH & Co KG, German patent 1,257,742, patent abstr, 8 (6) part B, 14th Feb 1968, 1.

• Publisher: Elsevier Science
• Year: 1968
• Tongue: English
• Weight: 153 KB
• Volume: 18
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/0042-207x(68)92187-8