Matthews, Douglas L. Trademarks
WATER PRESS
Filed: April 6, 1992
publishing student laboratory manuals about oceanography and marine biology
Owned by: Matthews, Douglas L.
Serial Number: 74262975
EXPERT SYSTEMS FOR TEACHERS
Filed: August 5, 2012
Downloadable electronic educational, teaching and course related materials for all grades pre-school through twelfth grade…
Owned by: Matthews, Douglas L.
Serial Number: 85695559
