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Patents Grantslast 30 patents

Information Patent Grant
Semiconductor laser driving circuit
- Patent number 5,163,063
- Issue date Nov 10, 1992
- Copal Co., Ltd.
- Yukio Yoshikawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Stepper motor with input connector array
- Patent number 5,004,941
- Issue date Apr 2, 1991
- Copal Co., Ltd.
- Yoshiyuki Ohzeki
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Apparatus for manipulating a magnetic tape cartridge and the magnet...
- Patent number 4,991,037
- Issue date Feb 5, 1991
- Copal Co., Ltd.
- Munetaka Shimizu
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk cartridge shutter opening and closing mechanism
- Patent number 4,811,137
- Issue date Mar 7, 1989
- Copal Co., Ltd.
- Yoshio Muto
- G11 - INFORMATION STORAGE
Information Patent Grant
Drive and control circuit for laser diode
- Patent number 4,807,239
- Issue date Feb 21, 1989
- Copal Electronics Co., Ltd.
- Hiroshi Takano
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Electronic calculator with time display function
- Patent number 4,245,323
- Issue date Jan 13, 1981
- Copal Co., Ltd.
- Masaru Yamazaki
- G04 - HOROLOGY

Patents Applicationslast 30 patents

Trademarklast 30 trademarks

Information Trademark
73512604 - WRITE HAND
- Serial number 73512604
- Registration number 1350454
- Filing date Dec 7, 1984
- COPAL (U.S.A.) INC.
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments