logo

For the Inventor, By the Inventor

Suwa, Japan

Norio Hama

This inventor holds 9 USPTO granted patents. Top assignee: Seiko Epson Corporation. Active years: 1993-1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Norio Hama. Retrieved from https://idiyas.com/inventor/norio-hama

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 1.4

ph-index = 9

Forward Citations = 315(Granted Patents)


Location History:

  • Nagano, JP (1993)
  • Nagano-ken, JP (1996)
  • Suwa, JP (1993 - 1999)

Company Filing History:

goldMedal9 out of 34,296 
 
Seiko Epson Corporation
 patents

Years Active: 1993-1999

Loading Chart...
9 patents (USPTO):Explore Patents
1. 5946610 - Portable radio apparatus having a slot antenna (1999-08-31),
2. 5757326 - Slot antenna device and wireless apparatus employing the antenna device (1998-05-26),
3. 5673054 - Antenna and miniature portable wireless transceiver (1997-09-30),
4. 5564096 - Wristwatch radio communication device having an improved noise shielding (1996-10-08),
5. 5532705 - Wrist-mounted-type antenna device and apparatus having the antenna device (1996-07-02),
6. 5450091 - Variable size antenna device having resonance frequency compensation (1995-09-12),
7. 5280646 - Paging device with structure for removing static electricity (1994-01-18),
8. 5265265 - Wristwatch radio communication device having an improved noise shielding (1993-11-23),
9. 5243356 - Antenna circuit and wrist radio instrument (1993-09-07),

Title: Norio Hama and His Antenna Innovations.

Introduction

Norio Hama is an inventor associated with Suwa, Japan, and Seiko Epson Corporation. His work includes compact antenna designs for portable radio and wireless devices. He is credited with 9 patents.

Latest Patents

Hama’s listed patents include “Portable Radio Apparatus Having a Slot Antenna.” The invention describes a compact radio apparatus with a slot antenna shaped to fit a casing with a curved, bulging side. Its antenna uses two conductive plates, a slot groove, a short-circuiting element, and a tuning capacitor. The configuration is designed to reduce unused space inside the casing while supporting a smaller device.

Another listed patent is “Slot Antenna Device and Wireless Apparatus Employing the Antenna Device.” It presents a thin, miniaturized slot antenna intended to maintain transmitting and receiving performance. The design places a circuit substrate within a slot in a conductive antenna body, or uses conductive members arranged on or around the substrate. Some configurations also include a reflector on the opposite surface of the circuit substrate.

Career Highlights

Hama’s listed inventions focus on integrating antenna structures into compact electronic devices. His patent work addresses the practical challenge of reducing device size while preserving wireless performance.

Collaborations

Hama’s listed coworkers include Shunsuke Koyama and Teruhiko Fujisawa. His company affiliation is Seiko Epson Corporation.

Conclusion

Norio Hama’s patent portfolio highlights antenna designs that make efficient use of space in portable radio and wireless apparatus.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…