Inventor

Masao Tanahashi

Inventor

Hikone, JP

Overview

1983–2000

Patent span

Performing operations

Primary field (CPC B)

Patents· 24 as inventor

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

B26Bprimary

B26BHand-held cutting tools not otherwise provided for58%

A45DHairdressing or shaving equipment13%

H02KDynamo-electric machines10%

Y10TTechnical subjects covered by former us classification6%

B22FWorking metallic powder3%

C22CAlloys3%

C23CCoating metallic material3%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters3%

PatentTitleYear

6,098,288'Reciprocating-type electric shaver'2000 5,943,777'Dry shaver with a skin stretcher'1999 5,921,134'Vibratory linear actuator and method of driving the same'1999 5,810,843'Hand-held depilating device'1998 5,736,797'Linear oscillating motor'1998 5,706,582'Dry shaver with a skin stretcher'1998 5,632,087'Reciprocatory dry shaver'1997 5,551,154'Reciprocatory dry shaver'1996 5,548,899'Reciprocatory dry shaver'1996 5,546,659'Reciprocatory dry shaver'1996 5,539,984'Dry shaver with floating cutter heads'1996 5,507,753'Depilating device with skin guide stretcher'1996 5,398,412'Reciprocatory dry shaver'1995 5,356,415'Depilating device'1994 5,283,953'Rotary dry shaver'1994 5,189,792'Reciprocatory electric shaver'1993 5,156,805'Process of preparing a ferritic alloy with a wear-resistive alumina scale'1992 5,108,410'Depilating device'1992 5,046,249'Motor driven oscillating razor'1991 4,837,929'Dry shaver with a readily replaceable outer shearing foil'1989 4,635,360'Cutting head for an electric shaver'1987 4,589,205'Inner cutter for electric shavers'1986 4,493,149'Reciprocal blade assembly of electric shaver'1985 4,413,410'Electric shaver with rotary blade'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–2000Patents assigned to MATSUSHITA ELECTRIC WORKS LTD (24)· patent assignee history

1983–2000Based in Hikone, JP· patent location history

1989Based in Kadoma, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MATSUSHITA ELECTRIC WORKS LTD	24	1983–2000

Locations

Location	Patents	Span
Hikone, JP	23	1983–2000
Kadoma, JP	1	1989