...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
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| Number | Title | Issue Date |
| 6561101 | Explosive delay assembly An explosive delay assembly including a housing, the housing includes a continuous elongated sidewall surrounding a region bounded at one end by a top surface, the top surface including an aperture configured for accepting an end booster where the end boo... | 05/13/2003 |
| 4119040 | Variable time fuze A pyrotechnic delay fuze, for use in extended time explosive ordnances, crising a pyrotechnic delay cord in a spiral race in the base of the fuze. This system is activated through associated ignition materials. Upon initiation and propagation of the dela... | 10/10/1978 |
| 3994233 | Initiator cartridge An initiator cartridge having a close tolerance time delay mechanism to sctively provide substantially the same predetermined time delay for cartridge propellant ignition at extreme high and low temperatures as at an ambient temperature. A delay element ... | 11/30/1976 |