Patents
When researching the razors in my collection one of the things that I search for is to see if it has any Patents applicable to it.
These are the patents that I've found while doing those searches. I've listed them in date order (oldest to newest) with links to the patents and the razor itself.
| DATE GRANTED | PATENT NUMBER | Country | RAZOR LINK |
|---|---|---|---|
| 1910 October 25 | US973734 | U.S.A. | Krytyk |
| 1911 July 18 | US998009 | U.S.A. | Krytyk |
| 1913 January 21 | US1051094 | U.S.A. | Finney or Superman |
| 1918 January 22 | US1254037 | U.S.A. | AC Penn with Twist Knob |
| 1918 December 17 | US1288049 | U.S.A. | AC Penn with Lever |
| 1920 August 05 | GB148581 | Great Britian | Gnat |
| 1922 April 07 | GB156704 | Great Britian | AC Penn With Twist Knob |
| 1926 January 28 | US1639441 | U.S.A. | Ryley Resilient Razor |
| 1931 March 05 | GB344280 | Great Britian | Eclipse Red ring |
| 1931 November 03 | US1830576 | U.S.A. | Swing Sliding Lock |
| 1932 September 27 | US1879900 | U.S.A. | Cooper Monobilt |
| 1932 September 29 | GB380958 | Great Britian | Eclipse Red ring |
| 1933 June 19 | FR751456 | France | Famex |
| 1933 October 31 | US1933186 | U.S.A. | Ryley Resilient Razor |
| 1934 November 13 | US1980202 | U.S.A. | Cooper Monobilt |
| 1935 August 12 | FR789077 | France | Gibbs Reglable |
| 1936 August 19 | FR801804 | France | LeCoq (Palmer) |
| 1937 January 12 | FR807430 | France | Bohin |
| 1937 January 31 | CH188938 | Switzerland | Walbusch B3 |
| 1937 April 12 | FR815699 | France | Famex |
| 1937 June 21 | FR818474 | France | Gibbs Reglable |
| 1938 January 25 | US2106587 | U.S.A. | Bates |
| 1938 May 03 | US2116190 | U.S.A. | Davis Rythmic |
| 1938 June 02 | DE660801 | Germany | RAP |
| 1938 August 30 | CA376116 | Canada | Davis Rythmic |
| 1939 January 06 | DE669899 | Germany | Walbusch B5 |
| 1946 January 22 | US2393366 | U.S.A. | Grant Hammond |
| 1949 June 07 | SE132551 | Sweden | Strivel |
| 1951 August 30 | DE812402 | Germany | Apollo Mikron - Gen 1 |
| 1951 December 11 | US2577873 | U.S.A. | Strivel |
| 1953 March 10 | DE1653239 | Germany | Klinco Gummi-Elastisch |
| 1958 May 14 | DE1030221 | Germany | Apollo Mikron - Gen 3 |
| 1958 August 26 | US2848806 | U.S.A. | Gillette Serial Toggle |
| 1958 August 26 | US2848807 | U.S.A. | Gillette Bottom Dial |
| 1960 May 03 | US2934821 | U.S.A. | Gillette Standard Toggle |
| 1960 September 20 | US2952911 | U.S.A. | Gillette Bottom Dial |
| 1965 August 31 | US3203093 | U.S.A. | Schick Injectors |
| 1965 October 05 | US3209454 | U.S.A. | Gillette Slim |
| 1966 December 27 | US3293745 | U.S.A. | Schick Krona Adjustable |
| 1967 February 07 | US3302284 | U.S.A. | Schick Krona Adjustable |
| 1968 January 16 | US3363313 | U.S.A. | Schick Krona Adjustable |
| 1985 June 20 | DE3344364A1 | Germany | Merkur Futur |
| 2016 March 17 | US2016075040A1 | U.S.A. | Rockwell 6s or Rockwell 6C |
| 2017 May 30 | US D788367S | U.S.A. | Rockwell 6s or Rockwell 6C |
| 2019 February 19 | US D841241S | U.S.A. | Rockwell Model T (v1) |
| 2020 August 28 | CN211941023U | China | Wangsolid |
| 2020 October 29 | USD10807256B2 | U.S.A. | Rockwell 6s or Rockwell 6C |
| 2022 June 28 | PT 116974 A | Portugal | Tatara Muramasa |