| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 28 | |
| #2 | Canada | 21 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Consumer goods | |
| #3 | Machines | |
| #4 | Thermal processes | |
| #5 | Surface technology and coating | |
| #6 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Rail vehicle suspensions | |
| #2 | Wind musical instruments | |
| #3 | Couplings | |
| #4 | Unspecified technologies | |
| #5 | Furnaces | |
| #6 | Special designs | |
| #7 | Unspecified technologies | |
| #8 | Layered products | |
| #9 | Locks | |
| #10 | Railway bodies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Barrows Donald S | 49 |
| Publication | Filing date | Title |
|---|---|---|
| US2006291A | Registration control for pipe organs | |
| US1821610A | Organ stop or coupler actuating means | |
| US1973792A | Translucent panel | |
| US1821253A | Pipe organ valve action | |
| US1980964A | Organ valve structure | |
| US1821286A | Adjustable pipe organ valve | |
| US1821285A | Removable pipe organ valve | |
| US1756168A | Railway truck | |
| US1775114A | Railway truck | |
| US1753105A | Railway truck | |
| US1740143A | Railway truck | |
| US1740059A | Railway truck | |
| US1649377A | Inboard car truck | |
| US1694577A | Side frame | |
| US1684787A | Side frame | |
| US1717648A | Car truck | |
| US1694960A | Striking casting | |
| US1652808A | Car truck | |
| US1817729A | Car door fastener | |
| US1685209A | Draft rigging |