Forward Citations = 166

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2 inventors (with patents filed for the assignee):

John C Sham (7 out of 28 patents)

Fan Kai Leung (2 out of 2 patents)

7 patents: Sort by Forward Citations

1. 5822821 - Electric toothbrush (1998-10-20),

2. 5819364 - Detachable handle accessory for a portable steam vacuum cleaner (1998-10-13),

3. 5810026 - Electric hair-curling apparatus (1998-09-22),

4. 5771784 - Paddle for bread-making machine (1998-06-30),

5. 5771781 - Electrical deep-fryer (1998-06-30),

6. 5595672 - Automatic power interrupting apparatus for an electric appliance (1997-01-21),

7. 5463205 - Photosensitive switching apparatus for an electric appliance (1995-10-31),

Company Overview

Pentalpha Enterprises Ltd. is a leading construction and real estate development company, specializing in luxury residential and commercial properties. With a strong track record of delivering high-quality projects on time and within budget, Pentalpha is committed to excellence in every aspect of its business. Our team of experienced professionals ensures that each project is executed with precision and attention to detail, resulting in stunning properties that exceed our clients' expectations.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

7 Patents

#448 in Hong Kong

#3,895 in China

Hong Kong, China

Pentalpha Enterprises Ltd.

Forward Citations = 166

2 inventors:

John C Sham (7 out of 28 patents)

Fan Kai Leung (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Pentalpha Enterprises Ltd.. Retrieved from https://idiyas.com/company/pentalpha-enterprises

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

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]