A history of patent classification in the United States Patent and Trademark Office 的封面图片
A history of patent classification in the United States Patent and Trademark Office
TITLE_DISPLAY:
A history of patent classification in the United States Patent and Trademark Office
个人著者:
Rotkin, Irving J.
出版信息:
Arlington, Va. : Patent Documentation Society, c1999.
格式:
图书
物理描述:
x, 53 p. ; 28 cm.
主题词汇:
Patents -- United States -- Classification.

Patents -- United States -- Classification -- History.
附加著者:
Dood, Kendall J.
附加团体著者:
Patent Documentation Society.