发明名称 Phototool having a strut for holding hinged members in an opened position
摘要 A phototool having hinged first and second members with a strut assembly holding the members in the opened positioned. The length of the strut assembly varies as the members are moved to opened and closed positions.
申请公布号 US4896188(A) 申请公布日期 1990.01.23
申请号 US19880250303 申请日期 1988.09.28
申请人 BYERS, THOMAS L. 发明人 BYERS, THOMAS L.
分类号 G03B27/04;G03B27/20 主分类号 G03B27/04
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