Title:
DEVICE FOR OPERATING ELONGATED CORDS
Document Type and Number:
United States Patent 3438423

Inventors:
Melull, Fredrick H.
Schmidt, Waldemar M.
Publication Date:
04/15/1969
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Assignee:
Fredrick, Melull H.
Waldemar, Schmidt M.
Primary Class:
160/331
International Classes:
A47H3/04; A47H5/032; E06B9/70; A47H3/00; A47H5/00; E06B9/68; A47H1/00; B66D1/76
US Patent References:
2752150Garage door operator
2798194Electric motor for drape operating mechanism
2827286Dispensing apparatus
3096078Motorized traverse rod operator
3269454Drapery actuator


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