Patent
   D828328
Priority
Oct 21 2016
Filed
Oct 21 2016
Issued
Sep 11 2018
Expiry
Sep 11 2033
Assg.orig
Entity
unknown
1
12
n/a
The ornamental design for a passive sound proliferation device, substantially as shown and described.

FIG. 1 is a perspective view of a passive sound proliferation device showing my new design;

FIG. 2 is another perspective view thereof'

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof'

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines illustrate environment and forms no part of the claimed design.

Morin, Joseph Dieudonne

Patent Priority Assignee Title
ER1544,
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