| 1854 SPRAGUE Steam Boiler Adjustable Flue Patent 8148 |
| 1930 HENTSCHEL Flue Deflector Gas Stoves Patent 49330 |
| 1928 MCCARTHY Design Deflector Flue Cap Patent 49396 |
| 1921 SHIRLEY Design Flue Cleaning Blade Patent 39236 |
| 1889 HALL Design Pipe Collar Flue Stopper Patent 44002 |
| 1930 MCCARTHY Flue Cap Ornamental Design Patent 49322 |
| 1930 HENTSCHEL Gas Stoves Flue Deflector Patent 49329 |
| 1889 FLANAGEN Pipe Collar Flue Stopper Patent 44004 |
| 1941 TICKNOR Flue Structure Patent 7490 |
| 1894 LAWRENCE Refrigerator Side Flue Patent 6673 |
| 1888 HALL Design Flue Stopper Collar Patent 44016 |
| 1930 MCCARTHY Ornamental Design Flue Cap Patent 49321 |
| 1943 HEIMAN Ornamental Design Flue Cap Patent 48771 |
| 1880 PARSON Boiler Flue Cleaner Patent 10309 |
| 1901 SHIRLEY Design Flue Cleaner Blade Patent 38953 |
| 1929 MCCARTHY Ornamental Design Flue Cap Patent 49362 |
| 1929 ALTIMARI Exhaust Flue Sander Patent 10077 |
| 1889 ROHRMAN Pipe Collar Flue Stopper Patent 44000 |
| 1885 DUENNISCH Flue Cleaner Design Patent 10327 |
| 1901 NEWMAN Flue Punch Tool Design Patent 10576 |