The broken lines shown in the drawings represent portions of the heat exchanger for water heater that form no part of the claimed design.
The broken lines shown in the drawings represent portions of the heat exchanger for water heater that form no part of the claimed design.
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| Number | Date | Country | |
|---|---|---|---|
| Parent | 29702759 | Aug 2019 | US |
| Child | 29758050 | US |