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.)
PHOTO ELECTROGRAPH Ltd LONDON
ES&A Robinson Ltd
Original Assignee
PHOTO ELECTROGRAPH Ltd LONDON
ES&A Robinson Ltd
Publication date
Application grantedgrantedCritical
Publication of CA390379ApublicationCriticalpatent/CA390379A/en