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.)
HALLOWELL WS
HARRISON SAFETY BOILER WORKS
JONES JC
Original Assignee
HALLOWELL WS
HARRISON SAFETY BOILER WORKS
JONES JC
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 HALLOWELL WS, HARRISON SAFETY BOILER WORKS, JONES JCfiledCriticalHALLOWELL WS
Application grantedgrantedCritical
Publication of CA111135ApublicationCriticalpatent/CA111135A/en