| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Brazil | 2 | |
| #3 | Canada | 2 | |
| #4 | France | 2 | |
| #5 | United States | 2 | |
| #6 | Argentina | 1 | |
| #7 | Australia | 1 | |
| #8 | Belgium | 1 | |
| #9 | Switzerland | 1 | |
| #10 | Spain | 1 | |
| #11 | United Kingdom | 1 | |
| #12 | Israel | 1 | |
| #13 | Italy | 1 | |
| #14 | Netherlands | 1 | |
| #15 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines | |
| #3 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Unspecified technologies | |
| #3 | Mixing | |
| #4 | Chemical or physical processes | |
| #5 | Heat-exchange device details |
| # | Name | Total Patents |
|---|---|---|
| #1 | Holl Richard Adolf | 5 |
| #2 | Holl R | 4 |
| #3 | Hall Richard Adolph | 3 |
| #4 | Holl Richard A | 1 |
| #5 | Holl R A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1554040A | Apparatus and process for the treatment of materials by ultrasonic longitudinal pressure oscillations | |
| CA1110227A | Apparatus and processes for the treatment of materials by ultrasonic longitudinal pressure oscillations | |
| FR2295769A1 | Mesh sheets used as packing to distribute fluids - have spaced oversize threads making them self-spacing and self-supporting | |
| US4000993A | Process for scrubbing gas streams | |
| ZA7309312B | Venturi-type devices | |
| US3870082A | Venturi-type devices |