Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"HENRY CHARLES H" Page 1

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发明授权
Tunable light filter 失效
Title translation: 可调光过滤器

公开(公告)号：US3439974A

公开(公告)日：1969-04-22

申请号：US3439974D

申请日：1966-03-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： HENRY CHARLES H , THOMAS DAVID G

IPC: G01J3/12 , G02B27/28 , G02F1/24

CPC classification number: G01J3/12 , G02B27/288

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