| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Hand-held cutting tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Mansfield Warren M | 5 |
| #2 | Norbert Shaeffer | 4 |
| #3 | Spanel Abraham N | 2 |
| #4 | Nathaniel Spanel Abraham | 1 |
| #5 | Davis Roy P M | 1 |
| #6 | Miller Davis Roy Paul | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2746144A | Hair cutter | |
| US2722739A | Hair trimming device | |
| US2731717A | Hair cutters | |
| US2597653A | Razor type hair trimmer | |
| US2569344A | Hair trimming comb | |
| US2589230A | Hair trimming device | |
| US2615244A | Reversible hair trimmer | |
| US2636261A | Hair trimmer | |
| US2612684A | Hair trimming type razor | |
| US2576618A | Handle type hair trimmer | |
| US2641055A | Hair trimmer | |
| CA580613A | Hair cutters |