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1.发明授权Method of making a light bulb with a plurality of independently connected filaments for indicating graphic symbols 失效制造具有多个独立连接的光纤的灯泡的方法用于指示图形符号
公开(公告)号：US3529335A
公开(公告)日：1970-09-22
申请号：US3529335D
申请日：1968-07-16
Applicant: PINLITES INC
Inventor： DEMAREST PHILIP C , KARLSON KARL
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