Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Francaise Thomson Houston SAfiledCriticalCompagnie Francaise Thomson Houston SA
Priority to FR19209ApriorityCriticalpatent/FR88044E/fr
Priority to BE676124Dprioritypatent/BE676124A/xx
Priority to AT119366Aprioritypatent/AT269513B/de
Priority to ES0322909Aprioritypatent/ES322909A1/es
Priority to GB6246/66Aprioritypatent/GB1138451A/en
Priority to NL6601759Aprioritypatent/NL6601759A/xx
Application grantedgrantedCritical
Publication of FR88044EpublicationCriticalpatent/FR88044E/fr
G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Optics & Photonics
(AREA)
FR19209A1965-02-121965-06-02Dispositif de protection d'une surface contre les salissures et la corrosion
ExpiredFR88044E
(fr)