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US2080083A
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Manufacture of hardened or tempered glass plates
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Device for hardening glass plates
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Method and device for hardening glass
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GB443804A
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Improved manufacture of hardened or tempered glass
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GB439537A
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Improvements in electric furnaces for heating sheets of plate glass or sheet glass before tempering
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Improved manufacture of hardened or tempered glass plates
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Improvements in or relating to processes and devices for tempering glass
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US2078541A
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Process for tempering glass
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US2055981A
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Electric furnace for heating sheets of plate glass or sheet glass before tempering
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GB444317A
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Improvements in or relating to the toughening of glass
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