31 Mar 1995
CANON KABUSHI KI KAISHA v. GREEN CARTRIDGE CO (HONG KONG) LTD AND ANOTHER
- Citation
- CANON KABUSHI KI KAISHA v. GREEN CARTRIDGE CO (HONG KONG) LTD AND ANOTHER
- Court
- Court of First Instance
- Case number
- HCA7844/1993
Court held as a matter of fact and law that Defendants infringed key Canon patents (notably UK Patent '054 and related patents) and reproduced copyrighted drawings; obviousness and added-matter attacks on the '054 patent failed (Wilcox '121 did not render invention obvious), certain other patents were invalid (eg claim(s) of '933 found obvious/invalid), second magnetic-member and helical-gear patents considered and some upheld; British Leyland repair doctrine does not extend to permitting wholesale manufacture and sale of complete replacement cartridges/consumables where majority of parts rem…