Patent application 13826556 (US), filed 2013-03-14
Publication number: US20140268965A1
Title: HIGH FREQUENCY MULTI-LEVEL INVERTER
CPC codes: H02M   7/4837
H02M   1/0043
H02M   1/088
H02M   7/42
H02M   7/483
H02M   7/487
Y02B  70/10
Office action: rejection, dated 2015-10-15
Rejection reasons: obviousness_103
Prior art cited: ref_id: 20110280052
ref_type: patent
severity: obviousness
Final disposition: granted (2015-10-15)