| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Canada | 2 | |
| #3 | Australia | 1 | |
| #4 | Belgium | 1 | |
| #5 | Germany | 1 |
| # | Technology | |
|---|---|---|
| #1 | Mountings for cannons and pistols | |
| #2 | Unspecified technologies | |
| #3 | Pistols and rifles | |
| #4 | Ships |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johnson David A | 10 |
| #2 | Johnson D A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4555051A | Sling for shoulder weapon | |
| CA1226248A | Sling for shoulder weapon | |
| CA1208057A | Spare magazine holder | |
| US4528765A | Externally visible safety device for firearms | |
| US4516515A | Boat plug reminder and method for use thereof | |
| US4484404A | Spare magazine holder | |
| US4483089A | Holder for pistol loader and cartridges | |
| US4429479A | Magazine latch release mechanism |