% Expired Patents = 25.0

Trademarks = 10

Forward Citations = 83

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2 inventors (with patents filed for the assignee):

Yongjie Xu (4 out of 17 patents)

Wei Dai (3 out of 23 patents)

4 patents: Sort by Forward Citations

1. 10506828 - Personal vaporizer with liquid supply by suction (2019-12-17),

2. 10258085 - System and method for vaporizing fluids by combustion (2019-04-16),

3. 9877509 - Micro-vaporizer heating element and method of vaporization (2018-01-30),

4. 9642397 - Personal vaporizer with liquid supply by suction (2017-05-09),

Westfield Limited (Ltd.) is a leading real estate development company focused on creating high-quality commercial and residential properties. With a strong track record of successful projects, Westfield is known for its commitment to excellence and innovation. From luxury apartments to state-of-the-art office buildings, Westfield is dedicated to shaping the future of urban landscapes.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

4 Patents

#735 in Hong Kong

#6,375 in China

Hong Kong, China

Westfield Limited (Ltd.)

Forward Citations = 83

2 inventors:

Yongjie Xu (4 out of 17 patents)

Wei Dai (3 out of 23 patents)

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