| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 2 | |
| #2 | Hong Kong | 2 | |
| #3 | India | 2 | |
| #4 | Malaysia | 2 | |
| #5 | United States | 2 | |
| #6 | Australia | 1 | |
| #7 | Brazil | 1 | |
| #8 | Canada | 1 | |
| #9 | United Kingdom | 1 | |
| #10 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Venting or aerating devices | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Waterfield Timothy Ottiwell Wy | 8 |
| #2 | Waterfield Timothy O W | 3 |
| #3 | Waterfield Wykeham | 2 |
| #4 | Ottiwell Timothy | 2 |
| #5 | Waterfield Timothy Ottiwell W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| HK46482A | Diaphragm valve | |
| HK46582A | Diaphragm valve | |
| BR8204381A | Flexible seat valve | |
| ZA8205341B | Soft seating valves | |
| CA1191419A | Soft seating valves | |
| GB2091389A | Improvements in or relating to soft seating valves | |
| EP0023409A1 | Diaphragm valves | |
| US4295485A | Diaphragm valve | |
| US4319737A | Diaphram valve |