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| Number | Title | Issue Date |
| 5513983 | Apparatus for vitrifying soot preform for optical fiber An apparatus for vitrifying a soot preform from which an optical fiber is produced by drawing, is composed of a main vacuum chamber 20 in which a muffle tube 70 for vitrifying the soot preform PF is located, and an auxiliary vacuum chamber 30 mounted on t... | 05/07/1996 |
| 4764109 | Heat treating, curing or stress relieving furnace An oven for heat treating, curing, stress relieving or otherwise treating objects within the oven has side walls that can be moved into contact and out of contact with side edges of a movable floor. All interior surfaces of the oven are insulated and, whe... | 08/16/1988 |
| 4025299 | Baking oven The oven includes a baking compartment and a lower compartment located beneath the baking compartment for receiving baked articles therefrom; a horizontal shelf separates the baking compartment from the lower compartment and is formed of a series of pivot... | 05/24/1977 |
