Inventor · disambiguated record
John C. Opfer
Also filed as: OPFER JOHN C
24 granted patents·1 pending application·235 citations·filing 1978–2015
96Inventor score
Top patents by PatentIndex Score
25 records- 0191US6040538ASwitchgear assemblyS & C ELECTRIC CO·Filed 1998·Granted Mar 21, 2000·58 cites·21 claims
- 0283US9576757B2Circuit interrupters with air trap regions in fluid reservoirsS & C ELECTRIC CO·Filed 2015·Granted Feb 21, 2017·3 cites·20 claims
- 0381US7626397B2High current capable circuit testing closer apparatus and methodS & C ELECTRIC CO·Filed 2007·Granted Dec 1, 2009·13 cites·10 claims
- 0476US4324959APre-insertion resistor mechanism for a circuit interrupting deviceS & C ELECTRIC CO·Filed 1978·Granted Apr 13, 1982·17 cites·13 claims
- 0561US8681462B2Circuit testing closer apparatus and method with in-rush current awarenessO'LEARY RAYMOND P·Filed 2006·Granted Mar 25, 2014·3 cites·8 claims
- 0661US5864107ASwitchgear assemblyS & C ELECTRIC CO·Filed 1996·Granted Jan 26, 1999·19 cites·8 claims
- 0759US5600112ABushing assembly with circuit interrupters including polyphase operating mechanismS & C ELECTRIC CO·Filed 1995·Granted Feb 4, 1997·17 cites·7 claims
- 0859US4683357ASwitch-operating mechanism with improved charging arrangementS & C ELECTRIC CO·Filed 1985·Granted Jul 28, 1987·12 cites·10 claims
- 0955US4237357AOperating mechanism for a high-voltage switchS & C ELECTRIC CO·Filed 1979·Granted Dec 2, 1980·8 cites·8 claims
- 1053US4238657ASwitch operator condition and position indicator mechanismS & C ELECTRIC CO·Filed 1978·Granted Dec 9, 1980·7 cites·14 claims
- 1151US6180902B1Fault interrupter and operating mechanism thereforS & C ELECTRIC CO·Filed 1997·Granted Jan 30, 2001·12 cites·11 claims
- 1250US4203083AOperating mechanism for a circuit interrupting deviceS & C ELECTRIC CO·Filed 1978·Granted May 13, 1980·7 cites·28 claims
- 1349US6127637ADisconnect feature for interrupterS & C ELECTRIC CO·Filed 1997·Granted Oct 3, 2000·13 cites·4 claims
- 1449US6114642ASwitchgear assemblyS & C ELECTRIC CO·Filed 1998·Granted Sep 5, 2000·8 cites·15 claims
- 1545US6628494B2Protective device and systemS & C ELECTRIC CO·Filed 2001·Granted Sep 30, 2003·4 cites·6 claims
- 1645US6429393B1Current transfer arrangement for circuit interrupterS & C ELECTRIC CO·Filed 2000·Granted Aug 6, 2002·3 cites·7 claims
- 1744US4668848AAlignment and centering arrangement for contacts of an interrupting deviceS & C ELECTRIC CO·Filed 1985·Granted May 26, 1987·7 cites·6 claims
- 1842USD722030SPole unit housing for electrical switchgearS & C ELECTRIC CO·Filed 2014·Granted Feb 3, 2015·4 cites·1 claims
- 1942US7440251B2Multi-path switching configurationS & C ELECTRIC CO·Filed 2005·Granted Oct 21, 2008·0 cites·2 claims
- 2042US7352265B2Manual trip control method and arrangement for multiple circuit interruptersS & C ELECTRIC CO·Filed 2005·Granted Apr 1, 2008·0 cites·3 claims
- 2141US6674027B2Operating arrangement for mechanismS & C ELECTRIC CO·Filed 2002·Granted Jan 6, 2004·2 cites·10 claims
- 2241US5298704AContact operating arrangement with shock-reducing feature for high-voltage apparatusS & C ELECTRIC CO·Filed 1992·Granted Mar 29, 1994·6 cites·8 claims
- 2340US5709553AFlexible connector for high-current conductorsS & C ELECTRIC CO·Filed 1996·Granted Jan 20, 1998·8 cites·7 claims
- 2438US2002093146A1Pressure relief arrangement for a housingFiled 2001·Application pending·0 cites
- 2534US5904577ASeparable, flexible electrical connection arrangementS & C ELECTRIC CO·Filed 1997·Granted May 18, 1999·4 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when John C. Opfer files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →