| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | United States | 4 | |
| #3 | Germany | 2 | |
| #4 | Switzerland | 1 | |
| #5 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Photographic composing devices | |
| #2 | Electric switches | |
| #3 | Dynamo-electric machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ackerman Howard B | 10 |
| #2 | Howard B Ackerman | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3278703A | Mercury switch activated by any mechanical means | |
| US2611799A | Rotary electromagnetic positioning device | |
| US2646733A | Record-actuated photocomposing machine | |
| US2632548A | Justifying compositor | |
| CA498939A | Record-actuated photo-composing machine | |
| CA498196A | Rotary electromagnetic positioning device | |
| CA324015A | Regulating valve | |
| CA510595A | Justifying compositor |