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.)
Mac Gruer Erving
Original Assignee
Mac Gruer Erving
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 Mac Gruer ErvingfiledCriticalMac Gruer Erving
Priority to ES68570ApriorityCriticalpatent/ES68570A1/en
Publication of ES68570A1publicationCriticalpatent/ES68570A1/en
ES68570A1918-12-241918-12-24
Improvements in the construction of masts or hollow yards, wooden tubes, struts and similar constructions.
ExpiredES68570A1
(en)