Assignee
DAY SAN TONG
TW·3 granted patents·81 citations·filing 1984–1987
Technology mixA45B3
Top patents by PatentIndex Score
3 records- 0161US4548222AFull-automatic umbrellaDAY SAN TONG·Filed 1984·Granted Oct 22, 1985·29 cites·4 claims
- 0257US4534374AFully automatic single push button type umbrellaDAY SAN TONG·Filed 1984·Granted Aug 13, 1985·24 cites·4 claims
- 0355US4823821AAutomatic single push button type umbrellaDAY SAN TONG·Filed 1987·Granted Apr 25, 1989·28 cites·5 claims
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