| All Patents in class 55/417 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 397,048 | Jan. 29, 1889 | E. Bretney | Dust-collector | waste collection mechanisms |
| 408,074 | Jul. 30, 1889 | E. Bretney | Dust-collector | waste collection mechanisms |
| 438,523 | Oct. 14, 1890 | E. Bretney | Dust-collector | waste collection mechanisms |
| 591,307 | Oct. 05, 1897 | B. Tupholme | Apparatus for Roasting Coffee | coffee roasters |
| 1,762,385 | Jun. 10, 1930 | R.L. Clark, C.T. Craker | Combined separator and trap assembly | separators |
| 2,113,447 | Apr. 05, 1938 | F. Hardinge | Water separator for fluid lines | separators |
| 2,189,895 | Feb. 13, 1940 | F.P. Grutzner | Heating and Ventilating System | cooling apparatus |
