§
Luxuse
Patent Intelligence
Patents
Companies
Categories
Portfolios
Maintenance
Utilities
Sign In
← Back to Companies
Beckwith Manufacturing Co
Beckwith M
Active Patents
0
Total Holdings
1
Patent Holdings
Filter in Explorer →
Patent No.
Title
Status
Filing Date
Grant Date
Claims
Actions
US2251252A
Air filter material for vacuum cleaners and the like
Expired / Lapsed
1940-09-11
1941-07-29
0
Details