Title:
Swimming pool and cover construction
United States Patent 3413661
US Patent References:
Invalid lifter
- - 1536766

Convertirle swimming pool and skating rimk
- - 1918437

Automatic lift for bathtubs
- - 2133587

Fluid device
- - 2337573

Hydraulic work holder
- - 2366979


Inventors:
Jack, Ross Norman
Publication Date:
12/03/1968
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Primary Class:
4/501
International Classes:
E04H4/06; E04H4/00
US Patent References:
2388990Electrically operated flush valve
3309716Swimming pool net elevator
Foreign References:
GB386404A
GB705811A
FR399969A




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