Improvements in or relating to pairs of spectacles or to monocles, having a field ofvision for at least one eye, which field is divided into field portions
摘要
申请公布号
GB1010249(A)
申请公布日期
1965.11.17
申请号
GB19640008702
申请日期
1964.03.02
申请人
PHILIPS ELECTRONIC AND ASSOCIATED INDUSTRIES LIMITED
