| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Spain | 3 | |
| #3 | Canada | 2 | |
| #4 | Austria | 1 | |
| #5 | Australia | 1 | |
| #6 | Switzerland | 1 | |
| #7 | Israel | 1 | |
| #8 | India | 1 | |
| #9 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Swimming pools | |
| #2 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | Duwe Edward C | 6 |
| #2 | Duwe William E | 6 |
| #3 | Duwe W E | 1 |
| #4 | Duwe Edward Carl | 1 |
| #5 | Duwe William Edward | 1 |
| #6 | Duwe E C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4102098A | Crypt closure panel and method for sealing a crypt opening | |
| CA1064228A | Apparatus for making modular crypts | |
| ES441805A1 | Apparatus including cammed fastening means for making modular crypts | |
| US4033545A | Apparatus for making interlocking crypt modules | |
| US3878656A | Modular mausoleum crypt system |