Inventor
Frederick L. T. Tsang
Inventor
Sai Ying Pun, HK
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Cprimary
G11CStatic stores22%
LOC2122%
A63HToys, e.g. tops, dolls, hoops or building blocks11%
H03KPulse technique11%
H10BElectronic memory devices11%
H10DInorganic electric semiconductor devices11%
LOC1911%
PatentTitleYear
D0422033'Electronic learning aid housing'2000D0413149'Electronic learning aid housing'1999D0407748'Electronic educational game housing'1999D0360224'Housing for an electronic instructional game apparatus'1995D0358421'Electronic educational activity toy'1995D0353566'Walker'19945,362,272'Activity toy and walker device'1994D0350373'Housing for an electronic instructional game apparatus'19944,250,570'Redundant memory circuit'19814,002,931'Integrated circuit bipolar bootstrap driver'19773,936,813'Bipolar memory cell employing inverted transistors and pinched base resistors'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1981Patents assigned to INTEL CORP (3)· patent assignee history
1976–1981Based in Saratoga, CA, US· patent location history
1994–1995Patents assigned to VTECH IND INC (4)· patent assignee history
1994Patents assigned to VIDEO TECH INDUSTRIES INC (1)· patent assignee history
1994–1995Based in Sai Ying Pun, HK· patent location history
1999Patents assigned to CHAN SANNIE L S (1)· patent assignee history
1999Patents assigned to TSANG FREDERICK L T (1)· patent assignee history
1999Based in Fanling, New Territories, HK· patent location history
1999Based in Fan Ling, HK· patent location history
2000Based in Fanling, HK· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| VTECH IND INC | 4 | 1994–1995 |
| INTEL CORP | 3 | 1976–1981 |
| CHAN SANNIE L S | 1 | 1999 |
| TSANG FREDERICK L Tself | 1 | 1999 |
| VIDEO TECH INDUSTRIES INC | 1 | 1994 |
Locations
| Location | Patents | Span |
|---|---|---|
| Sai Ying Pun, HK | 5 | 1994–1995 |
| Saratoga, California, US | 3 | 1976–1981 |
| Fanling, HK | 1 | 2000 |
| Fanling, New Territories, HK | 1 | 1999 |
| Fan Ling, HK | 1 | 1999 |