French patents abstracts.
Derwent Publications, Ltd.cn
London : Derwent Publications, Ltd.,
1961-1975.
Includes patents granted prior to issuing date.
Includes Indian and South African patents.
Description based on: Vol. 4, no. 1 (7 Jan. 1964).
Patents
French patents abstracts. Pt. 1, Chemical
French patents abstracts. Pt. 2, Mechanical & general
French patents abstracts. Pt. 3, Electrical