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1.发明授权Perpetual date-calendar for pencil-cases, walking-sticks, &c. 失效PERPETUAL DATE-CALENDAR FOR PENCIL-CASES，WALKING-STICKS＆C。
公开(公告)号：US633435A
公开(公告)日：1899-09-19
申请号：US1897633157
申请日：1897-04-21
Applicant: JAMES SINCLAIR HEITHERSAY
Inventor： DRAPER JAMES TONGHAM
CPC classification number: B43K29/0875
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