| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 4 | |
| #2 | Sweden | 4 | |
| #3 | United States | 4 | |
| #4 | Canada | 3 | |
| #5 | Switzerland | 3 | |
| #6 | Australia | 2 | |
| #7 | Brazil | 2 | |
| #8 | Germany | 2 | |
| #9 | France | 2 | |
| #10 | Italy | 2 | |
| #11 | Austria | 1 | |
| #12 | Belgium | 1 | |
| #13 | Spain | 1 | |
| #14 | Finland | 1 | |
| #15 | Norway | 1 | |
| #16 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Textiles and paper | |
| #3 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Analysing materials | |
| #2 | Measuring temperature | |
| #3 | Printing processes | |
| #4 | Chemical or physical processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ljungberg S | 6 |
| #2 | Ljungberg Stellan | 5 |
| #3 | Alm K | 5 |
| #4 | Tornmarck S | 3 |
| #5 | Toernmarck Sven Ivan Arvid | 2 |
| #6 | Tornmarck Sven Ivan Arvid | 2 |
| #7 | Tornmarck S I A | 2 |
| #8 | Karl Olof Alm | 2 |
| #9 | Alm Karl O | 2 |
| #10 | Alm K O | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US3977945A | Time and temperature-dependent enzymatic indicator | |
| US3751382A | Enzymatic indicator and method of making it | |
| CA952001A | Methods of establishing changes in occurring time-temperature conditions | |
| AU1253770A | Method of controlling whether food products are fit for human consumption, and indicating device therefor | |
| CA915554A | Methods of controlling whether food products are fit for human consumption, and indicating devices therefor |