DR. ROGER A JOHNSON, MD
Medical Practice at Hamline Ave, Saint Paul, MN
License number
Minnesota 017731
Category
Medical Practice
Type
Specialist
Address
Address
2233 Hamline Ave N SUITE# 402, Saint Paul, MN 55113
Phone
(651) 634-4002
(651) 634-4084 (Fax)
(651) 634-4084 (Fax)
Organization information
See more information about ROGER A JOHNSON at bizstanding.comRoger Johnson MD
2233 Hamline Ave N, Saint Paul, MN 55113
Industry:
Psychiatrist
Phone:
(651) 634-4002 (Phone)
Roger Alan Johnson
Professional information
Roger Johnson - Woodbury, MN
Education:
Metropolitan State University - Richfield, MN
vocational in HISTORY St. Paul - Minneapolis, MN
Master of Science in Project Management St. Mary's University - Minneapolis, MN
Business University of St. Thomas - Saint Paul, MN
Bachelors in Mathematics University of Minnesota - Minneapolis, MN University of Michigan - Ann Arbor, MI
Project Management Professional
vocational in HISTORY St. Paul - Minneapolis, MN
Master of Science in Project Management St. Mary's University - Minneapolis, MN
Business University of St. Thomas - Saint Paul, MN
Bachelors in Mathematics University of Minnesota - Minneapolis, MN University of Michigan - Ann Arbor, MI
Project Management Professional
Roger A Johnson, Roseville MN
Specialties:
Psychiatrist
Address:
2233 Hamline Ave N, Roseville, MN 55113
Education:
University of Minnesota, Medical School - Doctor of Medicine
San Mateo Medical Center - Residency - Psychiatry
San Mateo Medical Center - Residency - Psychiatry
Board certifications:
American Board of Psychiatry and Neurology Certification in Psychiatry (Psychiatry and Neurology)
Vibration Damper Having Extended Temperature Range And Low Temperature Shock Resistance
US Patent:
5118562, Jun 2, 1992
Filed:
Sep 24, 1990
Appl. No.:
7/587087
Inventors:
Roger W. Johnson - Shoreview MN
William D. Sell - St. Paul MN
Charles D. Wright - Birchwood MN
William D. Sell - St. Paul MN
Charles D. Wright - Birchwood MN
Assignee:
Minnesota Mining and Manufacturing Co. - St. Paul MN
International Classification:
B32B 516
US Classification:
428327
Abstract:
Constrained layer damping structures are often based on viscoelastic layers of iso-octyl acrylate:acrylic acid or analogous copolymers. As the acrylic acid content is increased, the peak damping temperature also increases; unfortunately, however, the copolymer becomes more brittle and susceptible to shock, especially at low temperatures. Incorporating small amounts of rubbery polymer particles (especially core-shell polymers) in the viscoelastic copolymer alleviates this problem.