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COPAL CO LTD

Overview
  • Total Patents
    2,371
About

COPAL CO LTD has a total of 2,371 patent applications. Its first patent ever was published in 1960. It filed its patents most often in Japan, United States and Germany. Its main competitors in its focus markets optics, measurement and audio-visual technology are REVERE CAMERA CO, EXPL DES BREVETS A G I SOC POU and FOUFOUNIS JEAN THEODORE.

Patent filings per year

Chart showing COPAL CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Inoue Nobuyoshi 154
#2 Ishiguro Yasuo 152
#3 Takagi Masaaki 126
#4 Okabe Katsuhiko 107
#5 Toma Kiyoshi 105
#6 Kurosu Tomio 94
#7 Matsumoto Kunio 86
#8 Yoshikawa Yukio 67
#9 Takahashi Shigemi 58
#10 Nakamura Shigekazu 52

Latest patents

Publication Filing date Title
JP2000098445A Diaphragm device for optical equipment
JP2000098448A Focal-plane shutter for camera
JP2000098447A Shutter for camera
JPH1186074A Genuineness discriminating device for paper sheets
JPH11338058A Photographic paper rotating device and photograph printing device
JPH11338065A Carrying means for photograph printing processing device
JPH11333519A Roller leveler
JPH11341783A Pm-type stepping motor, and its manufacture
JPH11340668A Fan motor and fan motor with heat sink
JPH11338001A Diaphragm mechanism of camera
JPH11326989A Camera shutter
JPH11326990A Camera shutter
JPH11326988A Camera shutter
JPH11326992A Digital still camera
JPH11311822A Parallax correction mechanism for camera finder
JPH11305285A Digital camera shutter
JPH11300498A Detection of pressing error and pressing error detector
JPH11299165A Miniature dc motor
JPH11299167A Terminal construction for chip-type motor
JPH116498A Axial flow fan, manufacture of impeller body thereof and metal mold for manufacturing the impeller body