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Patent applications and USPTO patent grants for Straszewski; Klaus.The latest application filed is for "reservoir cartridge for writing pens".
Patent | Date |
---|---|
Reservoir cartridge for writing pens Grant 4,217,058 - Straszewski , et al. August 12, 1 | 1980-08-12 |
Automatic drafting instrument with stylographic pen Grant 4,173,020 - Anderka , et al. October 30, 1 | 1979-10-30 |
Blocking assembly for an automatic drafting device Grant 4,097,874 - Anderka , et al. June 27, 1 | 1978-06-27 |
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