Issued Patents All Time
Showing 25 most recent of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10567013 | Rotary system mounted piezoelectric generator, self-powered wireless communication terminal and wireless communication system | Hiroki KUWANO | 2020-02-18 |
| 9607186 | RF tag system which allows a scheduled start RF tag and a remote start RF tag to share the same frequency band | — | 2017-03-28 |
| 9379666 | Microwave band booster rectifier circuit, and wireless tag device and wireless tag system employing same | Kunio Sawaya | 2016-06-28 |
| 8559486 | RF tag, RF tag reader, and pulse code key detecting circuit, and RF tag system using them | — | 2013-10-15 |
| 8493181 | Sensor tag, sensor tag device, power receiving circuit, and sensor tag device power supply method | Kunio Sawaya | 2013-07-23 |
| 8253640 | Thin slot antenna having cavity, antenna power feeding method, and RFID tag device using the antenna and the method | Kunio Sawaya | 2012-08-28 |
| 8179263 | RF ID tag device | Kunio Sawaya | 2012-05-15 |
| 7187324 | Radiowave monitoring method and apparatus | — | 2007-03-06 |
| 6804617 | Field distribution measuring method and device | — | 2004-10-12 |
| 6400331 | Radio hologram observation apparatus and method therefor | — | 2002-06-04 |
| 6347060 | Hologram observation method and hologram observation apparatus and multi-dimensional hologram data processing method and multi-dimensional hologram data processing apparatus | — | 2002-02-12 |
| 6314271 | Method and apparatus for visualizing radio wave in certain area | — | 2001-11-06 |
| 6275181 | Radio hologram observation apparatus and method therefor | — | 2001-08-14 |
| 6249248 | Radio wave visualizing method and apparatus | — | 2001-06-19 |
| 6198539 | Hologram observation method and hologram observation apparatus | — | 2001-03-06 |
| 6188356 | Radio monitoring method and apparatus | — | 2001-02-13 |
| 6140960 | Hologram observation method for three-dimensional wave source distribution, and stereoscopic directivity estimation method of antenna and wave distribution observation method based on hologram observation | — | 2000-10-31 |
| 5974178 | Wavesource image visualization method using a partial division fast fourier transform | — | 1999-10-26 |
| 5752167 | Radio propagation simulation method, wave field strength inference method and three-dimensional delay spread inference method | — | 1998-05-12 |
| 5748314 | Correlation function measurement method and apparatus, and wave source image visualization method and apparatus based on correlation function measurement | — | 1998-05-05 |
| 5656932 | Non-contact type wave signal observation apparatus | — | 1997-08-12 |
| 5576978 | High resolution frequency analyzer and vector spectrum analyzer | — | 1996-11-19 |
| 5519402 | Doppler shift compensation apparatus | — | 1996-05-21 |
| 5146224 | AC signal generating apparatus for voltage and current standard | — | 1992-09-08 |
| 5093627 | Impedance and transfer characteristic measuring apparatus | — | 1992-03-03 |