Patents in the B26B21/20 category
1930 — Maktor Three Edge Safety Razor
Patent GB329127
Invention Improvements in and relating to Razors and Razor Blades
Filed Friday, 19th April 1929
Published Thursday, 15th May 1930
Inventor Florence Minnie Goddard
Language English
1931 — Circlette, Lady Marguerite Razor
Patent GB360988
Invention Improvements in or relating to Safety Razors
Filed Monday, 19th May 1930
Published Thursday, 19th November 1931
Inventor William Petrie Fraser
Language English
Patent US779233
Invention Razor
Filed Monday, 29th August 1904
Published Tuesday, 3rd January 1905
Inventor Lingue S. Morgan
Language English
1910 — Razor with Square Blade
Patent US951036
Invention Safey-Razor
Filed Thursday, 8th April 1909
Published Tuesday, 1st March 1910
Inventor John K. Waterman
Language English
Patent US998528
Invention Safety-Razor
Filed Wednesday, 5th October 1910
Published Tuesday, 18th July 1911
Inventor Witmer J. Kendig
Language English
Patent US1008648
Invention Safety-Razor
Filed Thursday, 21st May 1908
Published Tuesday, 14th November 1911
Inventor Charles J. Kiefer
Language English
Patent US1008719
Invention Safety-Razor
Filed Tuesday, 2nd October 1906
Published Tuesday, 14th November 1911
Inventor Otto Kampfe
Owner Kampfe Bros.
Language English
Patent US1011844
Invention Safety-Razor
Filed Saturday, 28th May 1910
Published Tuesday, 12th December 1911
Inventor Arthur James Postans
Language English
Patent US1035308
Invention Safety-Razor
Filed Wednesday, 10th May 1911
Published Tuesday, 13th August 1912
Inventor Royal L. Boulter
Language English
Patent US1040347
Invention Safety-Razor
Filed Wednesday, 6th October 1909
Published Tuesday, 8th October 1912
Inventor Otto Kampfe
Owner Kampfe Bros.
Language English
1912 — Square Blade Slant Razor
Patent US1041397
Invention Safety-Razor
Filed Thursday, 1st February 1912
Published Tuesday, 15th October 1912
Inventor David Wilson Wood
Language English
Patent US1059333
Invention Safety-Razor
Filed Saturday, 20th July 1907
Published Tuesday, 15th April 1913
Inventor Otto Kampfe
Owner Kampfe Bros.
Language English
1919 — 4 in 1 Razor With Four Edged Blade
Patent US1324010
Invention Razor
Filed Saturday, 26th April 1919
Published Tuesday, 2nd December 1919
Inventors Charles H. Hyman, Joseph F. Moeller
Owner 4 in 1 Safety Razor Company
Language English
1920 — Razor for “inaccessible parts of the body”
Patent US1342028
Invention Safety-Razor
Filed Tuesday, 21st January 1919
Published Tuesday, 1st June 1920
Inventor Lawrence S. Nordskog
Language English
1921 — Swivel Head Razor with Square Blade
Patent US1376182
Invention Safety-Razor
Filed Wednesday, 3rd March 1920
Published Tuesday, 26th April 1921
Inventor Oscar C. Williams
Language English
1921 — Circular Blade Armpit Razor
Patent US1382301
Invention Safety-Razor
Filed Monday, 30th August 1920
Published Tuesday, 21st June 1921
Inventor Mary M. McCaffrey
Owners Isabel Lees Bayless, Mary M. McCaffrey
Language English
1921 — 4 in 1 Single Edge Razor with Four Edged Blade
Patent US1398182
Invention Safety-Razor
Filed Tuesday, 23rd March 1920
Published Tuesday, 22nd November 1921
Inventor William Dwyer
Owner Four-in-One Safety Razor Company
Language English
Patent US1414646
Invention Safety Razor
Filed Monday, 27th June 1921
Published Tuesday, 2nd May 1922
Inventor Phillip Iroff
Language English
1923 — Slant Razor with Triangular Blade
Patent US1470757
Invention Safety Razor
Filed Wednesday, 3rd November 1920
Published Tuesday, 16th October 1923
Inventor Alexander B. Lauterbach
Owner De Luxe Brush Company
Language English
Patent US1501450
Invention Razor
Filed Monday, 26th April 1920
Published Tuesday, 15th July 1924
Inventor Hugo S. Hasselquist
Owner Collins Safety Razors
Language English
Patent US1573244
Invention Razor Blade
Filed Thursday, 5th January 1922
Published Tuesday, 16th February 1926
Inventor Dennis E. Hickey
Language English
1926 — Razor with Square Blade
Patent US1582707
Invention Safety Razor
Filed Monday, 2nd May 1921
Published Tuesday, 27th April 1926
Inventor David H. Trevor
Language English
1926 — Razor with Sqaure Blade
Patent US1607139
Invention Safety Razor
Filed Wednesday, 21st November 1923
Published Tuesday, 16th November 1926
Inventor Ralph Severino
Language English
1927 — Razor With Straight and Curved Edges
Patent US1618895
Invention Safety Razor
Filed Wednesday, 27th January 1926
Published Tuesday, 22nd February 1927
Inventor Lewis Taplinger
Language English
1929 — Razor with Square Blade
Patent US1721113
Invention Safety Razor
Filed Monday, 21st July 1924
Published Tuesday, 16th July 1929
Inventor Robert E. Hamilton
Language English
1932 — Numbered Polygonal Razor Blades
Patent US1872721
Invention Safety Razor Blade and Razor
Filed Wednesday, 8th July 1931
Published Tuesday, 23rd August 1932
Inventor Albert Frank Ford
Language English
Patent US1875480
Invention Safety Razor
Filed Saturday, 19th December 1931
Published Tuesday, 6th September 1932
Inventor Giles S. Moore
Language English
1932 — DE or Triangular Blade Razor
Patent US1875538
Invention Razor
Filed Monday, 6th April 1931
Published Tuesday, 6th September 1932
Inventor Richard G. Winkler
Language English
Patent US1958718
Invention Lady's Safety Razor
Filed Monday, 21st December 1931
Published Tuesday, 15th May 1934
Inventor Joseph J. Schermack
Language English
Patent US2127010
Invention Eyebrow Razor
Filed Monday, 22nd March 1937
Published Tuesday, 16th August 1938
Inventor Clara F. Sampson
Language English
Patent US2127881
Invention Safety Razor
Filed Monday, 10th May 1937
Published Tuesday, 23rd August 1938
Inventor Leopold Morris
Language English
1959 — Twist-To-Open Razor with Square Blade
Patent US2902758
Invention Four Edge Safety Razor
Filed Friday, 4th October 1957
Published Tuesday, 8th September 1959
Inventors Donald and Hyman I. Pressman
Language English
Patent US3127676
Invention Safety Razor
Filed Friday, 21st July 1961
Published Tuesday, 7th April 1964
Inventor Grady L. Johnson
Language English