International patent classification
International patent classification
/ WIPO
- Geneva: WIPO, 1994
- 6th ed. .
Vol. 4 (Section D: Textiles; Paper); ISBN: 92-805-0505-X; 69p.
92-805-0505-X
Library science
Patent classification
D 025.4PATENt N9
Vol. 4 (Section D: Textiles; Paper); ISBN: 92-805-0505-X; 69p.
92-805-0505-X
Library science
Patent classification
D 025.4PATENt N9