ONSAGER, DALE L

Minnesota (Blair) - Plumbing - Master Plumber
Issued

OPATRNY, ROBERT R

Minnesota (Hugo) - Plumbing - Master Plumber
Issued

OPINE, RONALD R

Minnesota (Anoka) - Plumbing - Master Plumber
Issued

OPSAHL, PAUL W

Minnesota - Plumbing - Master Plumber
Issued

OQUIST, TRACY J

Minnesota (Clarks Grove) - Plumbing - Master Plumber
Issued

ORDORFF, BRYAN R

Minnesota (Lakeville) - Plumbing - Master Plumber
Issued

ORDORFF, TROY D

Minnesota (Lakeville) - Plumbing - Master Plumber
Issued

OROURKE, CHARLES F

Minnesota - Plumbing - Master Plumber
Issued

ORR, DAVID C

Minnesota - Plumbing - Master Plumber
Expired

ORTHAUS, MICHAEL J

Minnesota (Marshall) - Plumbing - Master Plumber
Issued

ORTIZ, MARIO L

Minnesota - Plumbing - Master Plumber
Issued

ORTTEL, ANDREW J

Minnesota (Stacy) - Plumbing - Master Plumber
Issued

OSBERG, PHILLIP E

Minnesota (Elk River) - Plumbing - Master Plumber
Issued

OSBORNE, ROGER B

Minnesota (Winthrop) - Plumbing - Master Plumber
Issued

OSELAND, TERRANCE E

Minnesota (Nisswa) - Plumbing - Master Plumber
Issued

OSENDORF, PHILIP F

Minnesota - Plumbing - Master Plumber
Issued

OSLUND, DAVID J

Minnesota (Stanchfield) - Plumbing - Master Plumber
Issued

OSLUND, DANIEL L

Minnesota (Cambridge) - Plumbing - Master Plumber
Issued

OSTEBO, JEREMIAH P

Minnesota - Plumbing - Master Plumber
Issued

OSTENDORF, THOMAS F

Minnesota (Albany) - Plumbing - Master Plumber
Issued