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公开(公告)号：US720229A
公开(公告)日：1903-02-10
申请号：US1902130057
申请日：1902-11-04
Applicant: COURTS WILLIAM CHARLES
Inventor： COURTS WILLIAM CHARLES
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公开(公告)号：US744905A
公开(公告)日：1903-11-24
申请号：US1902133921
申请日：1902-12-04
Applicant: COURTS WILLIAM CHARLES
Inventor： COURTS WILLIAM CHARLES
CPC classification number: F23L1/00
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