| 201 |
Combined air and water heater |
US45645654 |
1954-09-16 |
US2833268A |
1958-05-06 |
WARREN ALBERT E |
|
| 202 |
Combination water heater and space heater |
US43255754 |
1954-05-26 |
US2833267A |
1958-05-06 |
HANDLEY HAROLD E |
|
| 203 |
Heat exchanger attachment for hot water heaters |
US33509553 |
1953-02-04 |
US2786653A |
1957-03-26 |
MARTIN JOHN A |
|
| 204 |
Combined water and air heating unit |
US44602954 |
1954-07-27 |
US2780714A |
1957-02-05 |
DOWNS CAS A |
|
| 205 |
Space heater attachment |
US34301353 |
1953-03-18 |
US2715177A |
1955-08-09 |
PFINGSTEN ALBERT A |
|
| 206 |
Combination water and warm air heating system |
US18222050 |
1950-08-30 |
US2689560A |
1954-09-21 |
JOHNSON RAYMOND C |
|
| 207 |
Combination water and room heater |
US11545849 |
1949-09-13 |
US2658502A |
1953-11-10 |
SEVERANCE HARLEY L |
|
| 208 |
Combination space and water heating unit |
US28535652 |
1952-05-01 |
US2643323A |
1953-06-23 |
CARLSON CLIFFORD E; GORDON HATCH |
|
| 209 |
Fuel-burning heater for air and/or water |
US65020546 |
1946-02-26 |
US2556170A |
1951-06-12 |
LOUIS DAVIDSON |
|
| 210 |
Warm air and hot-water heating apparatus |
US8419749 |
1949-03-29 |
US2529977A |
1950-11-14 |
THOMAS CECIL A P |
|
| 211 |
Portable heating apparatus |
US68102546 |
1946-07-02 |
US2467469A |
1949-04-19 |
JOHN FRISONE |
|
| 212 |
Fluid heater |
US51465343 |
1943-12-17 |
US2369993A |
1945-02-20 |
TURNER PRESCOTT K |
|
| 213 |
Combustion chamber heating device |
US2188535 |
1935-05-16 |
US2101903A |
1937-12-14 |
HALL MORA S |
|
| 214 |
Water heating unit |
US10365236 |
1936-10-02 |
US2099947A |
1937-11-23 |
CLARENCE TOMPSON; GEORGE RAY |
|
| 215 |
Water heater |
US6084736 |
1936-01-25 |
US2092658A |
1937-09-07 |
STEELE WILLIAM L |
|
| 216 |
Gas-heated hot-air furnace |
US14867226 |
1926-11-16 |
US1720239A |
1929-07-09 |
REZNOR GEORGE F |
|
| 217 |
Furnace |
US1685710D |
|
US1685710A |
1928-09-25 |
|
|
| 218 |
Water-heating attachment for hot-air furnaces |
US15612126 |
1926-12-21 |
US1649660A |
1927-11-15 |
BRISTOL CYRUS J |
|
| 219 |
Combination hot-water and hot-air furnace |
US15582626 |
1926-12-20 |
US1628459A |
1927-05-10 |
ANTON GABRIEL |
|
| 220 |
Air heater |
US72464224 |
1924-07-07 |
US1579389A |
1926-04-06 |
JEFFERSON PEACE THOMAS |
|
