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Patent
   D258499
Priority
Dec 21 1978
Filed
Dec 21 1978
Issued
Mar 10 1981
Expiry
Mar 10 1995
Inventors
Brown, Lar…
Assg.orig
Assg.curr
Entity
unknown
Referenced by
3
References
4
Maint.:
n/a
The ornamental design for a mine roof warning indicator, as shown.

FIG. 1 is a prospective view of the mine roof warning indicator showing our new design.

FIG. 2 is a perspective view with the indicator means in the danger warning position of the mine roof warning indicator showing our new design.

FIG. 3 is a top view of the mine roof warning indicator showing our new design.

FIG. 4 is a bottom view of a mine roof warning indicator showing our new design.
INVENTORS:

Brown, Larry L., Hamm, Robert G.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D345313, Feb 17 1993 Guard-Tech Industries, Inc. Portable motion detector
D351806, Aug 16 1993 1uard-Tech Industries, Inc. Portable motion detector
D358350, May 09 1994 Guard-Tech Industries, Inc. Receiver base module for a security system
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2725843,
3111655,
3137268,
3786503,
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