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- catalog contributor b4426588.
- catalog created "1977, 1978 printing.".
- catalog date "1977, 1978 printing.".
- catalog date "1978".
- catalog dateCopyrighted "1977, 1978 printing.".
- catalog extent "iv, 223 p. ;".
- catalog issued "1977, 1978 printing.".
- catalog issued "1978".
- catalog language "eng".
- catalog publisher "Washington : Dept. of Commerce, Patent and Trademark Office,".
- catalog title "Index to the U.S. patent classification.".
- catalog type "text".