AT306BAT306DAAT306BAT 306 BAT306 BAT 306BAT 306D AAT306D AAT 306DAAT 306 BAT306 BAT 306B
Authority
AT
Austria
Application number
Inventor
Frank Bunker Gilbreth
Original Assignee
Frank Bunker Gilbreth
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 Frank Bunker GilbrethfiledCriticalFrank Bunker Gilbreth
Application grantedgrantedCritical
Publication of AT306BpublicationCriticalpatent/AT306B/de