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| All Patents in class 187/338 | |||||
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| Number | Date | Patentee | Title | Type | |
| 405,163 | Jun. 11, 1889 | F.X. Hooper, C. Petersen | Elevator-hatchway | ||
| 429,519 | Jun. 03, 1890 | Z. Goodell | Hatchway for elevators | elevators and lifts | |