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Patents > Office: US & Inventor country: US & Number of text pages: 1-2

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None (668) · 1 (3) · Magneso Calcite Fire-Proof Company (2) · John A. Roebling's Sons (2) · Albert L. Watters (2)
IPCs:
None (509) · IPC B64B1/00 (39) · IPC B64C31/00 (21) · IPC B64C31/06 (21) · IPC F42B10/00 (19) · IPC B64C3/00 (14) · IPC B64C39/00 (13) · IPC B64C33/00 (9) · IPC B64C11/00 (7) · IPC B64C25/00 (6) · IPC B64C1/00 (5) · IPC A01H5/02 (5) · IPC B64C3/18 (5) · IPC B64C27/00 (5) · IPC B64C23/00 (5) · IPC B64C11/20 (5)
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