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Patent
   D246384
Priority
Feb 09 1976
Filed
Aug 09 1976
Issued
Nov 15 1977
Expiry
Nov 15 1991
Inventors
Brown, Bri…
Assg.orig
Moduloc Co…
Assg.curr
Moduloc Co…
Entity
unknown
Referenced by
10
References
5
Maint.:
n/a
The ornamental design for a pre-cast concrete unit for manholes, as shown and described.

FIG. 1 is a top perspective view of the design;

FIG. 2 is a bottom perspective view thereof.
INVENTORS:

Brown, Brian E., Hall, Alfred G.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
8826613, Feb 29 2012 PREFORM TRENCH DRAIN COMPANY LLC Utility trench system components
9068341, Feb 29 2012 PREFORM TRENCH DRAIN COMPANY LLC Utility trench system components
D686751, Feb 29 2012 Preform Trench Drain Company Utility trench side panel portion
D705446, Feb 29 2012 PREFORM TRENCH DRAIN COMPANY LLC Pipe trench side panel
D705447, Feb 29 2012 PREFORM TRENCH DRAIN COMPANY LLC Pipe trench side panel elbow
D709627, Feb 29 2012 PREFORM TRENCH DRAIN COMPANY LLC Pipe trench side panel
D710032, Feb 29 2012 PREFORM TRENCH DRAIN COMPANY LLC Pipe trench side panel elbow
D752246, Mar 14 2014 Prefabricated building part
D872838, Oct 31 2017 Gate box safety riser
D878634, May 12 2018 Steven, Collins Manhole safety cross
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2346361,
315836,
30695,
30697,
UK1,364,447,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Aug 09 1976Moduloc Concrete Products (London) Ltd.(assignment on the face of the patent)
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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