| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 4 | |
| #2 | United States | 3 | |
| #3 | Australia | 2 | |
| #4 | EPO (European Patent Office) | 2 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Physical training equipment |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ferrari Harry M | 8 |
| #2 | Shallenberger John M | 6 |
| #3 | Ferrari Matthew F | 4 |
| #4 | Swartz Michael R | 2 |
| #5 | Carr Ronald H | 1 |
| #6 | Ingram Harry W | 1 |
| #7 | Ferrari Harry | 1 |
| #8 | Harrington Raymond P | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4997186A | Racket frame having multi-dimensional cross-sectional construction | |
| US4903967A | Racket frame having holes for tailoring frame stiffness | |
| US4720105A | Weight and balance adjusting assembly for racquets |