| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 50 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Thermal processes | |
| #5 | Transport | |
| #6 | Furniture and games | |
| #7 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Grinding tools | |
| #2 | Unspecified technologies | |
| #3 | Locks | |
| #4 | Hand-held cutting tools | |
| #5 | Unspecified technologies | |
| #6 | Ignition and extinguishing | |
| #7 | Toys | |
| #8 | Containers for goods storage | |
| #9 | Cycles | |
| #10 | Wheelchairs and sledges |
| # | Name | Total Patents |
|---|---|---|
| #1 | John Holtzman | 48 |
| #2 | George Vlahov | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2322443A | Shaving equipment | |
| US2208672A | Lighter | |
| US1969752A | Razor blade holder | |
| US1959361A | Lock | |
| US2062311A | Pocket atomizer | |
| US1987191A | Razor blade and holder | |
| US1964157A | Hand operated lock | |
| US1943826A | Lock | |
| US1966171A | Hand operated lock | |
| US1964058A | Manually operated lock | |
| US2008211A | Razor blade sharpener | |
| US2030990A | Cigarette package holder | |
| US2078248A | Lock | |
| US1944177A | Cigar lighter | |
| US1864732A | Lighter | |
| US1878239A | Doorlock | |
| US1798882A | Symmetrical razor sharpener | |
| US1895871A | Aeroplane | |
| US1967885A | Lighter | |
| US1754319A | Lighter |