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Piedek Technical Laboratory

USPTO Granted Patents = 53

Forward Citations = 364

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1 inventor (with patents filed for the assignee):

Hirofumi Kawashima (53 out of 64 patents)

Core Competencies:

Quartz Crystal Resonator

Quartz Crystal Unit

Quartz Crystal Oscillator

Electronic Apparatus

Manufacturing Method

Piezoelectric Crystal Resonator

Quartz Crystal Tuning Fork Resonator

Resonator Unit

Oscillator Unit

Vibration Modes

Electronic Circuits

Crystal Oscillating Circuits

53 patents: Sort by Forward Citations

1. 11563406 - Quartz crystal resonator, quartz crystal unit, and quartz crystal oscillator (2023-01-24),

2. 11005420 - Quartz crystal unit, quartz crystal oscillator and electronic apparatus (2021-05-11),

3. 10594259 - Resonator, unit and oscillator (2020-03-17),

4. 10284143 - Quartz crystal unit, quartz crystal oscillator and electronic apparatus (2019-05-07),

5. 10199556 - Unit, oscillator and electronic apparatus (2019-02-05),

6. 9553560 - Quartz crystal unit, quartz crystal oscillator and electronic apparatus (2017-01-24),

7. 9431957 - Unit, oscillator and electronic apparatus (2016-08-30),

8. RE45829 - Method for manufacturing a quartz crystal unit (2015-12-28),

9. 9209381 - Quartz crystal unit, quartz crystal oscillator and electronic apparatus (2015-12-08),

10. 9203135 - Method for manufacturing quartz crystal resonator (2015-12-01),

11. 9077308 - Method for manufacturing a quartz crystal unit, quartz crystal oscillator and electronic apparatus (2015-07-07),

12. RE45582 - Method for manufacturing a quartz crystal unit (2015-06-22),

13. 8866567 - Quartz crystal unit, quartz crystal oscillator and electronic apparatus (2014-10-21),

14. 8806738 - Method for manufacturing quartz crystal unit, quartz crystal oscillator and electronic apparatus (2014-08-19),

15. 8766516 - Unit, oscillator and electronic apparatus (2014-07-01),

PIEDEK TECHNICAL LABORATORY is a leading provider of technical laboratory solutions. With a strong focus on research, development, and innovation, we specialize in providing high-quality and accurate testing services for various industries. Our state-of-the-art laboratory facilities, advanced equipment, and experienced team of scientists ensure reliable and precise results. We offer a wide range of testing services including material analysis, product testing, environmental testing, failure analysis, and more. We are committed to delivering excellence and exceeding customer expectations.

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Company Badge

USPTO Data Jan 1 1976 - Jan 13 2026

53 Patents

#680 in Tokyo

#1,616 in Japan

#12,974 in the World

Piedek Technical Laboratory

Forward Citations = 364

1 inventor:

Hirofumi Kawashima (53 out of 64 patents)

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