《INDEX OF PATENTS PART I LIST OF PATENTEES A ISSUED FROM THE UNITED STATES PATENT AND TRADEMARK OFFIC》求取 ⇩

1976《INDEX OF PATENTS PART I LIST OF PATENTEES A ISSUED FROM THE UNITED STATES PATENT AND TRADEMARK OFFIC》由于是年代较久的资料都绝版了,几乎不可能购买到实物。如果大家为了学习确实需要,可向博主求助其电子版PDF文件(由 1976 U.S.GOVERNMENT PRINTING OFFICE WASHINGTON:1976 出版的版本) 。对合法合规的求助,我会当即受理并将下载地址发送给你。