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.)
Expired
Application number
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.)
Electric Selector & Signal Co
MICHAEL BARRY LEONARD
Original Assignee
Electric Selector & Signal Co
MICHAEL BARRY LEONARD
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 Electric Selector & Signal Co, MICHAEL BARRY LEONARDfiledCriticalElectric Selector & Signal Co
Application grantedgrantedCritical
Publication of GB189320047ApublicationCriticalpatent/GB189320047A/en