Title:
Mattress construction
United States Patent 3354477
US Patent References:
Foldable box-spring mattress
- - 1554098
Double hinged inner spring unit
- - 3099843
Mattress construction and method of making the same
- - 3110043
Torsional edge spring for mattresses and the like
- - 3200417
Articulated hospital bedding
- - 3249952
Foldable box-spring mattress
- - 1554098
Double hinged inner spring unit
- - 3099843
Mattress construction and method of making the same
- - 3110043
Torsional edge spring for mattresses and the like
- - 3200417
Articulated hospital bedding
- - 3249952
Inventors:
Bartz, Fred H.
Publication Date:
11/28/1967
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Export Citation:
Assignee:
Bartz, Fred H.
Primary Class:
Other Classes:
5/722
International Classes:
A47C27/00; A47C27/045; A47C27/04
US Patent References:
| 3316568 | Hospital mattress with articulated frame |
Foreign References:
| DE1147724B |