Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Filter element and method for manufacture thereof and micro-filtration filter having the filter element

Filter element and method for manufacture thereof and micro-filtration filter having the filter element

US Patent 4940562 · Granted Jul 10, 1990

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Semiconductor chip with a porous single crystal layer and manufacturing method o2009
Method of producing a screen for a color display tube2003
Hollow-fiber membrane module2003
Photosensitive compositions and pattern formation method2002
Magnetic head device with feature protecting a conductive wire extending to a ma2002
Method of adjusting height of magnetic head2002
Photosensitive compositions and pattern formation method2002
Filter element2001
Method of detecting microscopic defects existing on a silicon wafer2001
Photosensitive compositions and pattern formation method2000
Method for the production of polyolefin hollow fiber filter bundles1997
Method for the production of polyolefin hollow fiber filter bundles1997