DOUGLAS & RUDD MFG CO has a total of 22 patent applications. Its first patent ever was published in 1916. It filed its patents most often in United States. Its main competitors in its focus markets electrical machinery and energy, machine tools and machines are SHEN HUIPING, HOFFMEISTER & SOHN and KOHEN RAN.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 22 |
# | Industry | |
---|---|---|
#1 | Electrical machinery and energy | |
#2 | Machine tools | |
#3 | Machines |
# | Name | Total Patents |
---|---|---|
#1 | Douglas Harry A | 22 |
Publication | Filing date | Title |
---|---|---|
US1339695A | Reflecting-lamp | |
US1377411A | Circuit-connector | |
US1261790A | Circuit-connector switch. | |
US1391303A | Connector | |
US1377410A | Circuit-extending plug | |
US1299147A | Circuit-continuing device. | |
US1261783A | Reflecting electric lamp. | |
US1261786A | Reflecting-lamp. | |
US1261784A | Reflecting-lamp. | |
US1261788A | Reflecting-lamp. | |
US1261785A | Reflecting electric lamp. | |
US1285071A | Reflecting-lamp. | |
US1261787A | Reflecting electric lamp. | |
US1291444A | Projector. | |
US1220141A | Circuit-connector. | |
US1236553A | Circuit-connector. | |
US1220140A | Circuit-connector. | |
US1236552A | Cowl-lamp. | |
US1220139A | Circuit-connector. | |
US1217925A | Cowl-lamp. |