ARGW Argus Worldwide Corporation (CE)

U.S Mine Makers Inc. - Definitive Agreement
Finalization and Corporate Developments

Bellingham,
WA – March 28, 2013 – U.S. Mine Makers
Inc. (PINKSHEETS:UMKR) is pleased to announce that it has negotiated
favorable terms on the acquisition of 80% of 400 acres of placer mining claims
in Sierra County, California (announced March 20, 2013).  In addition the Company is pleased to provide
an update on significant corporate developments.

Acquisition update/activity

UMKR
is finalizing a definitive agreement of its acquisition of 80% of 400 acres of
placer mining claims in Sierra County, California, located near the northern
end of the historic Motherlode district. 
The Company has negotiated favorable terms that reduce the risk to the
Company as it goes through the permitting and exploration process by
structuring the deal such that stock is issued in stages at market prices
rather than all at once while the price is low. 

In
connection with this acquisition the Company has been reviewing Phase I and
Phase II reports dated October 1992 from Keewatin Engineering, the engineering
firm that was commissioned to compile exploration and development reports of
the Allegheny-Forest-Downieville Mining District.  This two year multi-million dollar undertaking
covered several mining properties and included an extensive evaluation of the underground
hard-rock system and surface geology coupled with studies to identify precious metal
rock units, and additional structural geology studies within the district.  Keewatin reported that gold from the
acquisition placer mine was reported to vary from fine to very coarse and the
deposit has been described as being similar in character to the famous Black
Channel at the Ruby Mine, which is adjacent to our newly acquired property.

In reviewing these reports in conjunction with current
reports management believes there are likely many hidden gems in this district
and possibly all throughout California that have been overlooked due to the
past permitting stigma.  This not only presents great opportunities for
the company to secure additional high potential gold claims in this area, but
also on very favorable terms due to the current economic environment.

It
is important to note that the Ruby mine has recently been brought back into
production by North Bay Resources Inc. http://www.northbayresources.com/home.html,
a further testament that permitting happens in California.  As an addition to the advisory team, UMKR is
currently in discussions with the former manager of the Ruby mine who was
tenured for 15 years.  Adding this
advisor to the team is significant to UMKR as he has been working professionally
in the area for 30 years.

Corporate
Developments

UMKR
continues to develop a full management team including an advisory board.  We are in discussions with an advisor who has
extensive experience with public company management, compliance and financing.  The potential advisor also has experience and
familiarity with California permitting and has access to some of the best
permitting lawyers in California.

UMKR
has engaged compliance and regulatory professionals to complete full audits in
order to meet the company’s mandate to graduate the company to the QB.

Shares Outstanding 59,604,018

Float 9,509,183

Authorized Shares 300,000,000

This press release may contain certain forward-looking
statements that include elements of risk and uncertainty. Consequently, actual
results may differ substantially from those anticipated in such
statements.  These risks and
uncertainties are described in the quarterly and annual reports, and in the
documents submitted to the securities administration.

Contact:  U.S.
Mine Makers Inc. 209-386-7753 or visit www.usminemaker.com

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