| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 2 | |
| #2 | Germany | 2 | |
| #3 | France | 2 | |
| #4 | Italy | 2 | |
| #5 | Mexico | 2 | |
| #6 | United States | 2 | |
| #7 | Czechoslovakia | 1 | |
| #8 | Japan | 1 | |
| #9 | Philippines | 1 | |
| #10 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hirabayashi Fumio | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US4311423A | Hole-drilling, extruding and thread-forming sheet screw | |
| CS178949B2 | Screw into metal sheet | |
| US4068554A | Sheet screw | |
| JPS5256259A | Tapping screw | |
| DE2537446A1 | Self tapping screw for sheet metals - has pyramid type point piercing sheet and forming lip prior to tapping | |
| CA1029989A | Sheet screw | |
| PH15867A | Sheet screw | |
| IT1040015B | Self tapping screw for sheet metals - has pyramid type point piercing sheet and forming lip prior to tapping |