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Document Type and Number:
United States Patent 2716262
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Primary Class:
49/277
Other Classes:
292/DIG.020, 292/240, 292/192
US Patent References:
0676779
0796710
0867574
1263349
2011152
Window construction
2548681
Fastening
2581816
Fastener for butt joints
2664601
Window construction
Foreign References:
GB189303039A
GB183719015A
DE196512C
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