Inventor

Keiichi Numata

Inventor

Tokyo, JP

Overview

12→

Patents

1988–2012

Patent span

Electricity

Primary field (CPC H)

Patents· 12 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H03Kprimary

H03KPulse technique25%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations15%

C07KPeptides15%

A61KPreparations for medical, dental or toiletry purposes10%

C07HSugars10%

C12PFermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture5%

H01PWaveguides5%

H03FAmplifiers5%

H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses5%

H04BTransmission5%

PatentTitleYear

8,318,684'Antibiotics, bispolides A1, A2, and A3 as well as bispolides B1, B2a, B2b and B3 and processes for producing said antibiotics'2012 7,915,946'Switch circuit for high frequency signals wherein distortion of the signals are suppressed'2011 7,345,521'High frequency switch circuit'2008 7,298,215'Amplifying circuit'2007 7,180,375'PLL circuit'2007 6,987,414'High frequency switch circuit'2006 6,201,416'Field effect transistor logic circuit with reduced power consumption'2001 5,639,735'Antitumor antibiotic compounds: hayumicins and analogs thereof'1997 5,619,146'Switching speed fluctuation detecting apparatus for logic circuit arrangement'1997 5,096,884'Glidobactin PF-1 peptide antibiotics'1992 4,789,731'Semi-synthetic peptide antibiotics'1988 4,742,047'Semi-synthetic peptide antibiotics'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988Patents assigned to BRISTOL MYERS CO (2)· patent assignee history

1988–2012Based in Tokyo, JP· patent location history

1988–1992Based in Fuchu, JP· patent location history

1992–1997Patents assigned to BRISTOL MYERS SQUIBB CO (2)· patent assignee history

1997–2011Patents assigned to NEC CORP (7)· patent assignee history

1997Based in Wallingford, CT, US· patent location history

2012Patents assigned to FOREST RES INST MALAYSIA (1)· patent assignee history

2012Patents assigned to FUKAGAWA YASUO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NEC CORP	7	1997–2011
BRISTOL MYERS CO	2	1988
BRISTOL MYERS SQUIBB CO	2	1992–1997
FOREST RES INST MALAYSIA	1	2012
FUKAGAWA YASUO	1	2012

Locations

Location	Patents	Span
Tokyo, JP	9	1988–2012
Fuchu, JP	2	1988–1992
Wallingford, CT, US	1	1997