| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 241 | Radiation heater | US6483536 | 1936-02-20 | US2151516A | 1939-03-21 | JOHNSON RAYMOND C |
| 242 | Domestic boiler | US71564734 | 1934-03-15 | US2092334A | 1937-09-07 | RIEHL FREDERICK W |
| 243 | Water heating apparatus | US60513632 | 1932-04-14 | US1956735A | 1934-05-01 | OLOF SWANSON |
| 244 | Boiler | US35933529 | 1929-04-30 | US1925811A | 1933-09-05 | MERTZANOFF ANDRE M |
| 245 | Water heater | US50418430 | 1930-12-22 | US1810642A | 1931-06-16 | CARLSON CECIL G |
| 246 | Radiator heating connection for boilers | US23393327 | 1927-11-17 | US1762808A | 1930-06-10 | STEPHEN BALDYZAR |
| 247 | Heating furnace | US23515227 | 1927-11-23 | US1747855A | 1930-02-18 | BRADLEY WILLIAM T |
| 248 | Water-heating apparatus | US12326526 | 1926-07-19 | US1710665A | 1929-04-23 | MERTZANOFF ANDRE M |
| 249 | Boiler | US23437527 | 1927-11-19 | US1697015A | 1929-01-01 | MAJUGA DANIIL J |
| 250 | Hot-water furnace | US21666527 | 1927-08-31 | US1670913A | 1928-05-22 | STRICKER CHARLES J |
| 251 | Auxiliary water heater | US17534227 | 1927-03-14 | US1666660A | 1928-04-17 | MAKIN JOHN S |
| 252 | Hot-water-heating system | US6259825 | 1925-10-15 | US1599323A | 1926-09-07 | FRANK ALEXANDER H |
| 253 | Heating and ventilating system | US5221025 | 1925-08-24 | US1596143A | 1926-08-17 | JOHN BISCH |
| 254 | Boiler | US52718822 | 1922-01-05 | US1589689A | 1926-06-22 | PHILLIP HEAY |
| 255 | Water heater | US68779824 | 1924-01-22 | US1542282A | 1925-06-16 | WILLIAMS ELMER R |
| 256 | Hot-water boiler | US59171422 | 1922-10-02 | US1534150A | 1925-04-21 | GALE ADAMS CHARLES |
| 257 | Heating device | US56218822 | 1922-05-19 | US1531974A | 1925-03-31 | REISER FRED F |
| 258 | Combination heater | US60402422 | 1922-11-29 | US1452249A | 1923-04-17 | MILLER DANA O |
| 259 | Furnace | US24196518 | 1918-06-26 | US1363555A | 1920-12-28 | BEATTLE EARL S |
| 260 | Tank-heater. | US6443915 | 1915-12-01 | US1170518A | 1916-02-08 | EATON ALBERT N |
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