| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 5 | |
| #3 | Australia | 2 | |
| #4 | United Kingdom | 1 | |
| #5 | Mexico | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Consumer goods | |
| #3 | Control | |
| #4 | Textiles and paper | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Games | |
| #2 | Books | |
| #3 | Teaching materials | |
| #4 | Writing or drawing tools | |
| #5 | Printing processes | |
| #6 | Unspecified technologies | |
| #7 | Toys |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lenkoff Roger J | 9 |
| #2 | Garry Patrick J | 5 |
| #3 | Lenkoff Leon G | 4 |
| #4 | Landis Thomas J | 3 |
| #5 | Lenkoff Claire B | 1 |
| #6 | Lenkoff Roger | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA2353432A1 | Segmental toy game | |
| US6152449A | Combined sticker and invisible ink game | |
| US5261703A | Greeting card with compatible puzzle message | |
| US5217231A | Power of observation invisible ink game | |
| US5176460A | Pen cap for a writing instrument barrel | |
| US5160266A | Mix and match invisible ink game | |
| US5234344A | Book package | |
| US4586714A | Puzzle game | |
| US4514177A | Invisible ink quiz game |