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Patent applications and USPTO patent grants for Zetlin; Lev.The latest application filed is for "beamless floor and roof structure".
Patent | Date |
---|---|
Beamless floor and roof structure Grant 3,971,181 - Zetlin July 27, 1 | 1976-07-27 |
Structural member of sheet material Grant 3,906,571 - Zetlin September 23, 1 | 1975-09-23 |
Structural floor system accomodating multi-directional ducts Grant 3,903,667 - Zetlin September 9, 1 | 1975-09-09 |
Structural Member Of Sheet Material Grant 3,849,237 - Zetlin November 19, 1 | 1974-11-19 |
Cantilevered Roof Section Grant 3,591,991 - Zetlin July 13, 1 | 1971-07-13 |
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