OTC BB Press Releases - April 23, 2007 (part 4)

MTTG:OB - Material Technologies to Verify Fatigue Crack Repairs for the Alabama DOT

PLTG:OB - Platina Energy Group Announces Hiring Independent Asset Valuation Experts

SLGLF:OB - Silverado to participate in Chicago Gold Conference and Exhibition

SPDV:OB - SpaceDev's Systems Enable Successful Orbital Express Spacecraft Servicing Demonstration

VISRF:OB - Visiphor Receives Additional Funds