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YEN YUNG TSAI

Overview
  • Total Patents
    25
About

YEN YUNG TSAI has a total of 25 patent applications. Its first patent ever was published in 1984. It filed its patents most often in United States, EPO (European Patent Office) and Canada. Its main competitors in its focus markets optics, machines and semiconductors are PHOTOSCULPTURE LTD, CHROMALINE CORP and BARNES GEORGE.

Patent filings per year

Chart showing YEN YUNG TSAIs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Yen Yung-Tsai 24
#2 Wang Ching-Bore 1

Latest patents

Publication Filing date Title
US5339197A Optical pellicle with controlled transmission peaking
US5314728A Capture layer and method for delayed entrapment of contaminant particles
US5305878A Packaged optical pellicle
US5332604A Adhesive system for reducing the likelihood of particulate
US5271803A Method of forming finished edge of plural-layer optical membrane
US5203961A Wet die cutter assembly and method
US5168993A Optical pellicle holder
US5254375A Apparatus for controllably separating framed working area from remainder of the membrane
EP0252574A2 Method and apparatus for reducing particulates on photomasks
US4737387A Removable pellicle and method
CA1273783A Mounting preparation for optical membrane
US4759990A Composite optical element including anti-reflective coating
WO8501031A1 Dustfree packaging container and method