Learn more

LEVIEN RAPHAEL L

Overview
  • Total Patents
    29
  • GoodIP Patent Rank
    241,296
About

LEVIEN RAPHAEL L has a total of 29 patent applications. Its first patent ever was published in 1982. It filed its patents most often in United States, EPO (European Patent Office) and Canada. Its main competitors in its focus markets audio-visual technology, computer technology and optics are HAGIWARA SHIGERU, WING KING TONG PRINTING LTD and TECHNO MATHEMATICAL CO LTD.

Patent filings in countries

World map showing LEVIEN RAPHAEL Ls patent filings in countries

Patent filings per year

Chart showing LEVIEN RAPHAEL Ls patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Levien Raphael L 28

Latest patents

Publication Filing date Title
US2008005212A1 Method and apparatus for interactive curve generation
WO9917538A1 Method and apparatus for suppressing moire patterns
CA2078930A1 Register mark
EP0529965A2 High speed screening of images
US5337264A Time reversal gaussian approximation filter
CA2066020A1 High speed transition signalling communication system
US5331429A Digital generation of halftone images with error diffusion and frequency matched periodic screen rulings
US5276535A Method and apparatus for halftoning of images using grayscale error diffusion
US5315406A Screen generation for halftone screening of images using arbitrary distribution of transformed screen coordinates
US5307181A Screen generation for halftone screening of images using scan line segments of oversized screen scan lines
US5291310A Screen generation for halftone screening of images
US5218386A Eyeglasses with spectral color shift
US5055942A Photographic image reproduction device using digital halftoning to screen images allowing adjustable coarseness
US5155588A Color correction and apparatus for photographic reproduction
US4523271A Software protection method and apparatus