CORWIN TELEPHONE MFG COMPANY has a total of 41 patent applications. Its first patent ever was published in 1907. It filed its patents most often in United States. Its main competitors in its focus markets telecommunications, electrical machinery and energy and audio-visual technology are THOMSON ERICSSON TELEPHONES SO, AUTOMATISCHE FERNSPRECH ANLAGE and GEN TELEPHONE LAB INC.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 41 |
# | Industry | |
---|---|---|
#1 | Telecommunications | |
#2 | Electrical machinery and energy | |
#3 | Audio-visual technology |
# | Technology | |
---|---|---|
#1 | Telephonic communication | |
#2 | Selecting | |
#3 | Electric switches | |
#4 | Loudspeakers and microphones | |
#5 | Transmission |
# | Name | Total Patents |
---|---|---|
#1 | Corwin Elmer R | 24 |
#2 | Bals Charles A | 11 |
#3 | Johnson Morton L | 10 |
#4 | Royal Roscoe | 1 |
#5 | Staub Frank X | 1 |
Publication | Filing date | Title |
---|---|---|
US1075260A | Telephony. | |
US1075259A | Telephony. | |
US1071210A | Telephony. | |
US1085974A | Telephone system. | |
US1075258A | Telephony. | |
US1053998A | Telephone-exchange system. | |
US1071212A | Telephony. | |
US1033859A | Bank of keys. | |
US1071207A | Telephone system. | |
US1040629A | Telephone system. | |
US1040637A | Telephone-transmitter. | |
US1075257A | Telephony. | |
US1045034A | Telephony. | |
US1053997A | Telephony. | |
US1071208A | Telephone system. | |
US1030504A | Telephony. | |
US1056424A | Telephony. | |
US1056425A | Telephony. | |
US1056423A | Telephony. | |
US1040636A | Telephony. |