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Patent
   D246056
Priority
Feb 13 1976
Filed
Jul 30 1976
Issued
Oct 11 1977
Expiry
Oct 11 1991
Inventors
Thim, Stig
Assg.orig
A-Betong AB
Assg.curr
A-Betong AB
Entity
unknown
Referenced by
0
References
5
Maint.:
n/a
The ornamental design for a concrete sleeper block, as shown and described.

The FIGURE is a perspective view of a concrete sleeper block illustrating the upper face, one end and one side face thereof. The appearance of the other end and side face, respectively, is the same as shown. The bottom of the sleeper block is plain and unornamented.
INVENTORS:

Thim, Stig, Ahlquist, Claes

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2235356,
2725958,
2888779,
3945747, Oct 29 1974 Edging guide
229209,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Jul 30 1976A-Betong AB(assignment on the face of the patent)
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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