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Inventor

Yau Chung Siu

Inventor
Shatin, HK

Overview

2→
Patents
1999–2001
Patent span
Human necessities
Primary field (CPC A)

Patents· 2 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

A63Hprimary
A63HToys, e.g. tops, dolls, hoops or building blocks50%
G02BOptical elements, systems or apparatus50%
PatentTitleYear
6,179,682'Teaching toy telephone'20015,999,339'Hand-held magnifying device'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2001Patents assigned to LEARNING RESOURCES INC (2)· patent assignee history
1999–2001Based in Shatin, HK· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
LEARNING RESOURCES INC21999–2001
Locations
LocationPatentsSpan
Shatin, HK21999–2001