Patent
1987-08-14
1989-03-14
Gellner, Michael L.
350257, G03B 1714
Patent
active
048128651
ABSTRACT:
The intermediate optical instrument or the like means is provided with false coupling prevention means by which a coupling connection of the intermediate instrument and the like means to interchangeable lens unit which is unsuitable for combined use said intermediate instrument and the like means.
REFERENCES:
patent: 4199248 (1980-04-01), Schlapp et al.
patent: 4548488 (1985-10-01), Honda et al.
Gellner Michael L.
Minolta Camera Kabushiki Kaisha
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