Firearms – Barrels – Rifling or lining
Patent
1995-09-07
1998-06-02
Johnson, Stephen M.
Firearms
Barrels
Rifling or lining
42 101, 102501, 102430, F41A 2112, F41A 2118
Patent
active
057584460
ABSTRACT:
The present invention relates to the fire arm industry and more particularly to a system that impresses a bar type code into the lead bullet that has been fired from a gun. The identifying markings are placed on the gun barrel lands with as little visibility as possible but enough to form the code to identify the fired bullet as being from one specific handgun or rifle. The code markings may be placed on the barrel, without effecting its operation in any way. The microscopic identifying code markings are impressed in to the surface of the lands of the gun barrel and when the firearm is fired the force of the firing forms this particular gun's code on the bullet. These identifying code markings may be placed at the intersection of the chamber and the barrel so that when a bulletted cartridge is placed in the chamber and the gun is fired, the code marks are encoded on both the neck of the brass and the lead bullet surface, forming identical codes. The identifying code markings are similar to bar code markings and directly relates the spent casing that has been fired by a firearm to the lead bullet from that casing shell and to the firearm that fired it. The system of the present invention is especially useful for criminal investigations of a crime scene in which a firearm was used.
REFERENCES:
patent: 3562945 (1971-02-01), Mikola
patent: 4035942 (1977-07-01), Wiczer
patent: 4175346 (1979-11-01), Zemsky
patent: 5177318 (1993-01-01), Martinez et al.
patent: 5341720 (1994-08-01), Franzen et al.
patent: 5479737 (1996-01-01), Osbornet et al.
Johnson Stephen M.
Miller Alfred E.
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