Daniel T. Risch
37Patents
21h-index
29Co-inventors
85Inventor score
Filing activity: Oct 1, 1982 → Feb 19, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5820646A | Inline filter apparatus | Emerging Cross-Sectional Technologies | 512 | Expired |
| US5902364A | Conical filter | Emerging Cross-Sectional Technologies | 333 | Expired |
| US5772883A | Slanted inline filter | Emerging Cross-Sectional Technologies | 309 | Expired |
| US5792247A | Integrated resonator and filter apparatus | Emerging Cross-Sectional Technologies | 288 | Expired |
| US5895574A | Rolled liquid filter using fluted media | Performing Operations; Transporting | 284 | Expired |
| USD425189S | Combined filter element and frame therefor | General | 250 | Expired |
| USD396098S | Conical filter | General | 242 | Expired |
| USD398046S | Combined filter element and frame therefor | General | 233 | Expired |
| USD399944S | Conical filter | General | 158 | Expired |
| USD428128S | Conical filter | General | 144 | Expired |
| US5575826A | Air cleaner | Emerging Cross-Sectional Technologies | 112 | Expired |
| US7329326B2 | Method of making a fluted filter media for air filter | Emerging Cross-Sectional Technologies | 111 | Expired |
| US6048386A | Integrated resonator and filter apparatus | Emerging Cross-Sectional Technologies | 107 | Expired |
| US8226786B2 | Process and materials for coiling z-filter media, and/or closing flutes of filter media; and, products | Emerging Cross-Sectional Technologies | 87 | Expired |
| US7997425B2 | Fluted filter medium and process for its manufacture | Emerging Cross-Sectional Technologies | 82 | Expired |
| US5814219A | Pleated filter having a planar sheet of randomly arranged filaments to maintain pleat spacing | Performing Operations; Transporting | 68 | Expired |
| US4443235A | Self-cleaning cabinet dust collector | Performing Operations; Transporting | 62 | Expired |
| US5401285A | Air cleaner having scavenger arrangement for precleaner and filter thereof | Emerging Cross-Sectional Technologies | 53 | Expired |
| US5683479A | Air cleaner having scavenger arrangement | Emerging Cross-Sectional Technologies | 40 | Expired |
| US8961722B2 | Process and materials for coiling z-filter media; and/or closing flutes of filter media; and, products | Emerging Cross-Sectional Technologies | 25 | Active |
| US8460442B2 | Fluted filter media | Emerging Cross-Sectional Technologies | 23 | Active |
| US8512499B2 | Fluted filter medium and process for its manufacture | Emerging Cross-Sectional Technologies | 20 | Active |
| US5931988A | Cabinet filter assembly and methods | Performing Operations; Transporting | 19 | Expired |
| US8268053B2 | Fluted filter media | Emerging Cross-Sectional Technologies | 18 | Active |
| US6148519A | Apparatus for installing a packing material in a muffler assembly; and methods thereof | Emerging Cross-Sectional Technologies | 15 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.