Automatic door operator
United States Patent 3129936
US Patent References:
/0505270.html
- - 0505270

/0554819.html
- - 0554819

Door-control apparatus
- - 1594706

Door-operating apparatus
- - 1700433

Door operators
- - 2843376


Inventors:
Martin, Carlson
Publication Date:
04/21/1964
View Patent Images:
Download PDF 3129936 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Martin, Carlson
Primary Class:
49/264
Other Classes:
49/334, 49/28
International Classes:
E05F15/04; E05F15/12; E05F3/10; E05F15/00; E05F3/00
US Patent References:
2893725Fluid pressure responsive door operator