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
GB684564A
Inventor
George William Usher
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.)
TRIDENT IND Ltd
Original Assignee
TRIDENT IND Ltd
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 TRIDENT IND LtdfiledCriticalTRIDENT IND Ltd
Priority to GB684564ApriorityCriticalpatent/GB1113061A/en
Publication of GB1113061ApublicationCriticalpatent/GB1113061A/en