Inventor · disambiguated record
Duncan Tong
Also filed as: TONG DUNCAN
13 granted patents·239 citations·filing 1975–1988
93Inventor score
Top patents by PatentIndex Score
13 records- 0188USD296572SToy swimming dolphinDUNCAN PRODUCTS LTD·Filed 1985·Granted Jul 5, 1988·30 cites·1 claims
- 0287USD261292SClip for toy railway trackPLAYART LTD·Filed 1979·Granted Oct 13, 1981·21 cites·1 claims
- 0386US4832650AAquatic toysDUNCAN PRODUCTS LIMITED·Filed 1988·Granted May 23, 1989·56 cites·7 claims
- 0476USD249737SToy railway trackPLAYART LTD·Filed 1976·Granted Sep 26, 1978·12 cites·1 claims
- 0574USD264108SToy railway track sectionPLAYART LTD·Filed 1979·Granted Apr 27, 1982·11 cites·1 claims
- 0673US4713037ASwimming marine creature toysDUNCAN PRODUCTS LTD·Filed 1986·Granted Dec 15, 1987·31 cites·6 claims
- 0771US4135326AAquatic figure toyPLAYART LTD·Filed 1977·Granted Jan 23, 1979·20 cites·3 claims
- 0862US4150789AConnection device for toy vehicle tracksPLAYART LTD·Filed 1977·Granted Apr 24, 1979·18 cites·6 claims
- 0959US3935665ASubmersible toyPLAYART LTD·Filed 1975·Granted Feb 3, 1976·13 cites·9 claims
- 1057USD296573SToy swimming whaleDUNCAN PRODUCTS LTD·Filed 1985·Granted Jul 5, 1988·8 cites·1 claims
- 1152US4081133AToy track section with electrical connector safety meansPLAYART LTD·Filed 1976·Granted Mar 28, 1978·10 cites·9 claims
- 1251USD281797SLap counter for counting the passage of toy vehicles along a trackPLAYART LTD·Filed 1982·Granted Dec 17, 1985·5 cites·1 claims
- 1334US4116381AElectrical connection device for a toy vehicle trackPLAYART LTD·Filed 1976·Granted Sep 26, 1978·4 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →