Building units and construction elements – Structure – Greenhouse
Patent
1977-10-17
1979-08-07
Word, A. Hugo
Building units and construction elements
Structure
Greenhouse
D25 16, D25 19, D25 31, D25 32, D2503
Patent
active
D02525879
REFERENCES:
patent: 3224150 (1965-12-01), Burtoff et al.
patent: 3550601 (1970-12-01), Peters
patent: 3668287 (1972-06-01), Mackie
patent: 3859673 (1975-01-01), Meyerhoff, Sr.
patent: 3869827 (1975-03-01), Anderson et al.
patent: 3893270 (1975-09-01), Schupack et al.
Plant Site, Inc.
Word A. Hugo
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